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Search: id:A074733
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| A074733 |
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a(n+4) = floor [ ( a(n) + 2*a(n+1) + 3*a(n+2) + 4*a(n+3) )/5 ], with a(0), a(1), a(2), a(3) equal to 0, 1, 2, 3. |
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+0
2
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| 0, 1, 2, 3, 4, 6, 8, 12, 17, 25, 36, 53, 77, 112, 164, 239, 349, 510, 745, 1089, 1592, 2327, 3401, 4971, 7266, 10621, 15525, 22693, 33171, 48486, 70873
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OFFSET
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0,3
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COMMENT
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Ratio of each term to the preceding approaches 1.46172263..., a root of -5*x^4 + 4*x^3 + 3*x^2 + 2*x + 1.
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EXAMPLE
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a(7) = 12 because (3 + 2*4 + 3*5 + 4*8)/5 = 12.2 and 12.2 floored = 12
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CROSSREFS
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Cf. A074732.
Sequence in context: A018261 A018438 A107368 this_sequence A001461 A048597 A074964
Adjacent sequences: A074730 A074731 A074732 this_sequence A074734 A074735 A074736
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KEYWORD
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easy,nonn
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AUTHOR
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Axel Harvey (ax(AT)hirsig.ca), Sep 05 2002
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