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Search: id:A061980
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| A061980 |
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Square array read by antidiagonals of T(n,k)=T(n-1,k)+T(n-1,[k/2])+T(n-1,[k/3]) with T(0,0)=1. |
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7
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| 1, 0, 3, 0, 2, 9, 0, 1, 8, 27, 0, 0, 6, 26, 81, 0, 0, 4, 23, 80, 243, 0, 0, 3, 20, 76, 242, 729, 0, 0, 3, 17, 72, 237, 728, 2187, 0, 0, 1, 17, 66, 232, 722, 2186, 6561, 0, 0, 1, 11, 66, 222, 716, 2179, 6560, 19683, 0, 0, 1, 11, 54, 222, 701, 2172, 6552, 19682, 59049, 0, 0
(list; table; graph; listen)
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OFFSET
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0,3
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EXAMPLE
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Rows start (1,0,0,0,0,...), (3,2,1,0,0,...), (9,8,6,4,3,...), (27,26,23,20,17,...) etc.
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CROSSREFS
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Row sums are 6^n: A000400. Columns are A000244, A024023, A060188, A061981, A061982 twice, A061983 twice, etc. Cf. A061290, A061930, A061979, A061984, A061987.
Sequence in context: A085550 A126671 A099095 this_sequence A059683 A030208 A126598
Adjacent sequences: A061977 A061978 A061979 this_sequence A061981 A061982 A061983
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KEYWORD
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nonn,tabl
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), May 24 2001
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