A002413 - cp's OEIS frontend

A002413 Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n(n+1)(5*n-2)/6.

n	a(n)
0	0
1	1
2	8
3	26
4	60
5	115
6	196
7	308
8	456
9	645
10	880
11	1166
12	1508
13	1911
14	2380
15	2920
16	3536
17	4233
18	5016
19	5890
20	6860
21	7931
22	9108
23	10396
24	11800
25	13325
26	14976
27	16758
28	18676
29	20735
30	22940
31	25296
32	27808
33	30481
34	33320
35	36330
36	39516
37	42883
38	46436
39	50180
40	54120

[0, 1, 8, 26, 60, 115, 196, 308, 456, 645, 880, 1166, 1508, 1911, 2380, 2920, 3536, 4233, 5016, 5890, 6860, 7931, 9108, 10396, 11800, 13325, 14976, 16758, 18676, 20735, 22940, 25296, 27808, 30481, 33320, 36330, 39516, 42883, 46436, 50180, 54120]

cp's OEIS Frontend

A002413 Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n(n+1)(5*n-2)/6.

Table of values

List of values

cp's OEIS Frontend

A002413 Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n*(n+1)*(5*n-2)/6.

Table of values

List of values

A002413 Heptagonal (or 7-gonal) pyramidal numbers: a(n) = n(n+1)(5*n-2)/6.