A271389 - cp's OEIS frontend

A271389 a(n) = 2*a(n-1) + a(n-2) + n^2 for n > 1, with a(0) = 0, a(1) = 1.

n	a(n)
0	0
1	1
2	6
3	22
4	66
5	179
6	460
7	1148
8	2820
9	6869
10	16658
11	40306
12	97414
13	235303
14	568216
15	1371960
16	3312392
17	7997033
18	19306782
19	46610958
20	112529098
21	271669595
22	655868772
23	1583407668
24	3822684684
25	9228777661
26	22280240682
27	53789259754
28	129858760974
29	313506782543
30	756872326960

[0, 1, 6, 22, 66, 179, 460, 1148, 2820, 6869, 16658, 40306, 97414, 235303, 568216, 1371960, 3312392, 7997033, 19306782, 46610958, 112529098, 271669595, 655868772, 1583407668, 3822684684, 9228777661, 22280240682, 53789259754, 129858760974, 313506782543, 756872326960]

cp's OEIS Frontend

A271389 a(n) = 2*a(n-1) + a(n-2) + n^2 for n > 1, with a(0) = 0, a(1) = 1.

Table of values

List of values