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Search: id:A061929
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| A061929 |
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Triangle with n >= k >= 0 where a(n,k) = 2^k*3^(n-k)*(C(n+1,0)+C(n+1,1)+...C(n+1,k)). |
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+0
2
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| 1, 3, 6, 9, 24, 28, 27, 90, 132, 120, 81, 324, 576, 624, 496, 243, 1134, 2376, 3024, 2736, 2016, 729, 3888, 9396, 13824, 14256, 11520, 8128, 2187, 13122, 35964, 60264, 70416, 63072, 47424, 32640, 6561, 43740, 134136, 252720, 331776, 330048, 268416
(list; table; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n, k) =A054143(n, k)*A036561(n, n-k)
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EXAMPLE
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Rows start (1), (3,6), (9,24,68), (27,90,132,120) etc.
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CROSSREFS
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Row sums are 5^(n+1)-4^(n+1), i.e. A005060. Cf. A061930.
Sequence in context: A089001 A050889 A026095 this_sequence A019461 A067862 A062927
Adjacent sequences: A061926 A061927 A061928 this_sequence A061930 A061931 A061932
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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 22 2001
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