A329478 - cp's OEIS frontend

A329478 a(n) = (Sum_{k=0..n-1}(-1)^k(15k+8)beta(k)t(k))/(2n), where beta(k) = A005258(k), and t(k) is the coefficient of x^k in the expansion of (x^2+4x-1)^k.

n	a(n)
1	4
2	-67
3	1640
4	-37725
5	565296
6	11056402
7	-1580442016
8	96102180805
9	-4456155445400
10	168095261788962
11	-4821193706309376
12	61671590987433918
13	4332508360801598880
14	-462368336475965777100
15	28320921191994637110240
16	-1347995180149692947542005
17	51430890880452230248836840

[4, -67, 1640, -37725, 565296, 11056402, -1580442016, 96102180805, -4456155445400, 168095261788962, -4821193706309376, 61671590987433918, 4332508360801598880, -462368336475965777100, 28320921191994637110240, -1347995180149692947542005, 51430890880452230248836840]

cp's OEIS Frontend

A329478 a(n) = (Sum_{k=0..n-1}(-1)^k(15k+8)beta(k)t(k))/(2n), where beta(k) = A005258(k), and t(k) is the coefficient of x^k in the expansion of (x^2+4x-1)^k.

Table of values

List of values

cp's OEIS Frontend

A329478 a(n) = (Sum_{k=0..n-1}(-1)^k*(15*k+8)*beta(k)*t(k))/(2*n), where beta(k) = A005258(k), and t(k) is the coefficient of x^k in the expansion of (x^2+4*x-1)^k.

Table of values

List of values

A329478 a(n) = (Sum_{k=0..n-1}(-1)^k(15k+8)beta(k)t(k))/(2n), where beta(k) = A005258(k), and t(k) is the coefficient of x^k in the expansion of (x^2+4x-1)^k.