A056520 - cp's OEIS frontend

A056520 a(n) = (n + 2)(2n^2 - n + 3)/6.

n	a(n)
0	1
1	2
2	6
3	15
4	31
5	56
6	92
7	141
8	205
9	286
10	386
11	507
12	651
13	820
14	1016
15	1241
16	1497
17	1786
18	2110
19	2471
20	2871
21	3312
22	3796
23	4325
24	4901
25	5526
26	6202
27	6931
28	7715
29	8556
30	9456
31	10417
32	11441
33	12530
34	13686
35	14911
36	16207
37	17576
38	19020
39	20541
40	22141
41	23822

[1, 2, 6, 15, 31, 56, 92, 141, 205, 286, 386, 507, 651, 820, 1016, 1241, 1497, 1786, 2110, 2471, 2871, 3312, 3796, 4325, 4901, 5526, 6202, 6931, 7715, 8556, 9456, 10417, 11441, 12530, 13686, 14911, 16207, 17576, 19020, 20541, 22141, 23822]

cp's OEIS Frontend

A056520 a(n) = (n + 2)(2n^2 - n + 3)/6.

Table of values

List of values

cp's OEIS Frontend

A056520 a(n) = (n + 2)*(2*n^2 - n + 3)/6.

Table of values

List of values

A056520 a(n) = (n + 2)(2n^2 - n + 3)/6.