A136115 - cp's OEIS frontend

A136115 Index m of least pentagonal number P(m) > P(n) such that P(m)+P(n) is again a pentagonal number, 0 if no such m exists.

n	a(n)
1	0
2	0
3	0
4	7
5	0
6	0
7	23
8	0
9	0
10	48
11	0
12	22
13	82
14	47
15	0
16	125
17	26
18	0
19	22
20	37
21	71
22	238
23	0
24	0
25	26
26	166
27	0
28	52
29	207
30	147
31	117
32	99
33	87
34	572
35	72
36	67
37	63
38	357
39	57
40	110
41	416
42	51
43	917
44	82
45	47
46	1050
47	217
48	380
49	167
50	246
51	0
52	97
53	697
54	0
55	374
56	191
57	537
58	1672
59	152
60	112
61	136
62	380
63	215
64	2037
65	68

[0, 0, 0, 7, 0, 0, 23, 0, 0, 48, 0, 22, 82, 47, 0, 125, 26, 0, 22, 37, 71, 238, 0, 0, 26, 166, 0, 52, 207, 147, 117, 99, 87, 572, 72, 67, 63, 357, 57, 110, 416, 51, 917, 82, 47, 1050, 217, 380, 167, 246, 0, 97, 697, 0, 374, 191, 537, 1672, 152, 112, 136, 380, 215, 2037, 68]

cp's OEIS Frontend

A136115 Index m of least pentagonal number P(m) > P(n) such that P(m)+P(n) is again a pentagonal number, 0 if no such m exists.

Table of values

List of values