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Search: id:A139606
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| A139606 |
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6th transversal numbers (or 6-transversal numbers): (A000217(6)-6)*n + 6. |
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+0
20
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| 6, 21, 36, 51, 66, 81, 96, 111, 126, 141, 156, 171, 186, 201, 216, 231, 246, 261, 276, 291, 306, 321, 336, 351, 366, 381, 396, 411, 426, 441, 456, 471, 486, 501, 516, 531, 546, 561, 576, 591, 606, 621, 636, 651, 666, 681, 696, 711, 726
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OFFSET
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0,1
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COMMENT
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Numbers of the 6th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 6th column in the square array A057145.
a(n)=15n+6; for n>6, seventh column [A144562] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 13 2009]
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FORMULA
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a(n) = (A000217(6)-6)*n + 6 = (21-6)n + 6 = 15n + 6 = 3(5n + 2).
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CROSSREFS
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Cf. A001477, A000217, A000290, A000326, A000384, A000566, A000567, A001106, A001107, A051682, A051624, A051865, A051866, A051867, A051868, A051869, A051870, A000007, A000012, A000027, A008585, A016957, A017329, A139607, A139608, A139609, A139610, A139611, A139612, A139613, A139614, A139615, A139616, A057145, A086271, A139600, A139601, A016873.
Cf. A144562, A153238, A067076 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 13 2009]
Sequence in context: A063126 A115702 A003340 this_sequence A047717 A089982 A151943
Adjacent sequences: A139603 A139604 A139605 this_sequence A139607 A139608 A139609
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 27 2008
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