A006956 - cp's OEIS frontend

A006956 Denominator of (2n+1)(2n+2) B_{2n}, where B_n are the Bernoulli numbers. Also denominators of the asymptotic expansion of the polygamma function psi'''(z).

n	a(n)
3	1
4	1
5	1
6	1
7	3
8	1
9	1
10	15
11	1
12	5
13	21
14	5
15	1
16	21
17	1
18	1
19	231
20	5
21	1
22	1365
23	1
24	55
25	21
26	1
27	1
28	663
29	11
30	5
31	57
32	5
33	1
34	15015
35	1
36	17
37	483
38	1
39	11
40	25935
41	1
42	5
43	21
44	935
45	1
46	7917
47	1
48	23
49	19437
50	5
51	1
52	3315
53	1
54	55
55	21
56	1
57	1
58	191919
59	253
60	2465
61	21
62	5
63	1
64	1734915
65	1
66	1
67	17157
68	17
69	1

[1, 1, 1, 1, 3, 1, 1, 15, 1, 5, 21, 5, 1, 21, 1, 1, 231, 5, 1, 1365, 1, 55, 21, 1, 1, 663, 11, 5, 57, 5, 1, 15015, 1, 17, 483, 1, 11, 25935, 1, 5, 21, 935, 1, 7917, 1, 23, 19437, 5, 1, 3315, 1, 55, 21, 1, 1, 191919, 253, 2465, 21, 5, 1, 1734915, 1, 1, 17157, 17, 1]

cp's OEIS Frontend

A006956 Denominator of (2n+1)(2n+2) B_{2n}, where B_n are the Bernoulli numbers. Also denominators of the asymptotic expansion of the polygamma function psi'''(z).

Table of values

List of values