A033568 - cp's OEIS frontend

A033568 Second pentagonal numbers with odd index: a(n) = (2n-1)(3*n-1).

n	a(n)
0	1
1	2
2	15
3	40
4	77
5	126
6	187
7	260
8	345
9	442
10	551
11	672
12	805
13	950
14	1107
15	1276
16	1457
17	1650
18	1855
19	2072
20	2301
21	2542
22	2795
23	3060
24	3337
25	3626
26	3927
27	4240
28	4565
29	4902
30	5251
31	5612
32	5985
33	6370
34	6767
35	7176
36	7597
37	8030
38	8475
39	8932
40	9401
41	9882
42	10375
43	10880
44	11397
45	11926

[1, 2, 15, 40, 77, 126, 187, 260, 345, 442, 551, 672, 805, 950, 1107, 1276, 1457, 1650, 1855, 2072, 2301, 2542, 2795, 3060, 3337, 3626, 3927, 4240, 4565, 4902, 5251, 5612, 5985, 6370, 6767, 7176, 7597, 8030, 8475, 8932, 9401, 9882, 10375, 10880, 11397, 11926]

cp's OEIS Frontend

A033568 Second pentagonal numbers with odd index: a(n) = (2n-1)(3*n-1).

Table of values

List of values

cp's OEIS Frontend

A033568 Second pentagonal numbers with odd index: a(n) = (2*n-1)*(3*n-1).

Table of values

List of values

A033568 Second pentagonal numbers with odd index: a(n) = (2n-1)(3*n-1).