A139268 - cp's OEIS frontend

A139268 Twice nonagonal numbers (or twice 9-gonal numbers): a(n) = n(7n-5).

n	a(n)
0	0
1	2
2	18
3	48
4	92
5	150
6	222
7	308
8	408
9	522
10	650
11	792
12	948
13	1118
14	1302
15	1500
16	1712
17	1938
18	2178
19	2432
20	2700
21	2982
22	3278
23	3588
24	3912
25	4250
26	4602
27	4968
28	5348
29	5742
30	6150
31	6572
32	7008
33	7458
34	7922
35	8400
36	8892
37	9398
38	9918
39	10452
40	11000

[0, 2, 18, 48, 92, 150, 222, 308, 408, 522, 650, 792, 948, 1118, 1302, 1500, 1712, 1938, 2178, 2432, 2700, 2982, 3278, 3588, 3912, 4250, 4602, 4968, 5348, 5742, 6150, 6572, 7008, 7458, 7922, 8400, 8892, 9398, 9918, 10452, 11000]

cp's OEIS Frontend

A139268 Twice nonagonal numbers (or twice 9-gonal numbers): a(n) = n(7n-5).

Table of values

List of values

cp's OEIS Frontend

A139268 Twice nonagonal numbers (or twice 9-gonal numbers): a(n) = n*(7*n-5).

Table of values

List of values

A139268 Twice nonagonal numbers (or twice 9-gonal numbers): a(n) = n(7n-5).