A074085 - cp's OEIS frontend

A074085 Coefficient of q^2 in nu(n), where nu(0) = 1, nu(1) = b and, for n >= 2, nu(n) = bnu(n-1) + lambda(1 + q + q^2 + ... + q^(n - 2))*nu(n-2) with (b,lambda) = (2,1).

n	a(n)
0	0
1	0
2	0
3	0
4	5
5	24
6	91
7	308
8	978
9	2978
10	8802
11	25440
12	72251
13	202316
14	559941
15	1534548
16	4170256
17	11250630
18	30158900
19	80389600
20	213204513
21	562896832
22	1480086111
23	3877337556
24	10123000126
25	26347306474
26	68378847990
27	176994780672

[0, 0, 0, 0, 5, 24, 91, 308, 978, 2978, 8802, 25440, 72251, 202316, 559941, 1534548, 4170256, 11250630, 30158900, 80389600, 213204513, 562896832, 1480086111, 3877337556, 10123000126, 26347306474, 68378847990, 176994780672]

cp's OEIS Frontend

A074085 Coefficient of q^2 in nu(n), where nu(0) = 1, nu(1) = b and, for n >= 2, nu(n) = bnu(n-1) + lambda(1 + q + q^2 + ... + q^(n - 2))*nu(n-2) with (b,lambda) = (2,1).

Table of values

List of values

cp's OEIS Frontend

A074085 Coefficient of q^2 in nu(n), where nu(0) = 1, nu(1) = b and, for n >= 2, nu(n) = b*nu(n-1) + lambda*(1 + q + q^2 + ... + q^(n - 2))*nu(n-2) with (b,lambda) = (2,1).

Table of values

List of values

A074085 Coefficient of q^2 in nu(n), where nu(0) = 1, nu(1) = b and, for n >= 2, nu(n) = bnu(n-1) + lambda(1 + q + q^2 + ... + q^(n - 2))*nu(n-2) with (b,lambda) = (2,1).