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Search: id:A139615
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| A139615 |
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15th transversal numbers (or 15-transversal numbers): (A000217(15)-15)*n + 15. |
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+0
17
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| 15, 120, 225, 330, 435, 540, 645, 750, 855, 960, 1065, 1170, 1275, 1380, 1485, 1590, 1695, 1800, 1905, 2010, 2115, 2220, 2325, 2430, 2535, 2640, 2745, 2850, 2955, 3060, 3165, 3270, 3375, 3480, 3585, 3690, 3795, 3900, 4005, 4110, 4215
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OFFSET
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0,1
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COMMENT
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Numbers of the 15th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 15th column in the square array A057145.
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FORMULA
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a(n) = (A000217(15)-15)*n + 15 = (120-15)n + 15 = 105n + 15 = 15(7n + 1).
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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, A139606, A139607, A139608, A139609, A139610, A139611, A139612, A139613, A139614, A139616, A057145, A086271, A139600, A139601, A016993.
Sequence in context: A091347 A125352 A126510 this_sequence A027484 A126898 A010967
Adjacent sequences: A139612 A139613 A139614 this_sequence A139616 A139617 A139618
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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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