|
| |
|
|
A061929
|
|
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)).
|
|
1
| |
|
|
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; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
FORMULA
| a(n, k) =A054143(n, k)*A036561(n, n-k)
|
|
|
EXAMPLE
| Rows start (1), (3,6), (9,24,68), (27,90,132,120) etc.
|
|
|
CROSSREFS
| Row sums are 5^(n+1)-4^(n+1), i.e. A005060. Cf. A061930.
Sequence in context: A089001 A050889 A026095 * A019461 A067862 A062927
Adjacent sequences: A061926 A061927 A061928 * A061930 A061931 A061932
|
|
|
KEYWORD
| nonn,tabl
|
|
|
AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), May 22 2001
|
| |
|
|
