A321156 - cp's OEIS frontend

A321156 Numbers that have exactly 5 representations as a k-gonal number, P(n,k) = n((k-2)n - (k-4))/2, k and n >= 3.

n	a(n)
1	561
2	1485
3	1701
4	2016
5	2556
6	2601
7	2850
8	3025
9	3060
10	3256
11	3321
12	4186
13	4761
14	4851
15	5226
16	5320
17	5565
18	5841
19	6175
20	6216
21	6336
22	6525
23	6670
24	7425
25	7821
26	7840
27	8001
28	8100
29	8625
30	8646
31	9730
32	9856
33	9945
34	9976
35	10116
36	10296
37	10450
38	10585
39	11025
40	11305
41	11340
42	12025
43	12090

[561, 1485, 1701, 2016, 2556, 2601, 2850, 3025, 3060, 3256, 3321, 4186, 4761, 4851, 5226, 5320, 5565, 5841, 6175, 6216, 6336, 6525, 6670, 7425, 7821, 7840, 8001, 8100, 8625, 8646, 9730, 9856, 9945, 9976, 10116, 10296, 10450, 10585, 11025, 11305, 11340, 12025, 12090]

cp's OEIS Frontend

A321156 Numbers that have exactly 5 representations as a k-gonal number, P(n,k) = n((k-2)n - (k-4))/2, k and n >= 3.

Table of values

List of values

cp's OEIS Frontend

A321156 Numbers that have exactly 5 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3.

Table of values

List of values

A321156 Numbers that have exactly 5 representations as a k-gonal number, P(n,k) = n((k-2)n - (k-4))/2, k and n >= 3.