A074084 - cp's OEIS frontend

A074084 Coefficient of q^1 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	2
4	9
5	32
6	102
7	306
8	883
9	2480
10	6828
11	18514
12	49597
13	131568
14	346194
15	904738
16	2350695
17	6076960
18	15641304
19	40103778
20	102473969
21	261046144
22	663180222
23	1680628946
24	4249496795
25	10722962256
26	27007159428
27	67904097074

[0, 0, 0, 2, 9, 32, 102, 306, 883, 2480, 6828, 18514, 49597, 131568, 346194, 904738, 2350695, 6076960, 15641304, 40103778, 102473969, 261046144, 663180222, 1680628946, 4249496795, 10722962256, 27007159428, 67904097074]

cp's OEIS Frontend

A074084 Coefficient of q^1 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

A074084 Coefficient of q^1 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

A074084 Coefficient of q^1 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).