A277621 - cp's OEIS frontend

A277621 Number of pairs (a,b) such that a*b = n! and d(a) = d(b) with d = A000005 and a <= b.

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	1
6	1
7	1
8	0
9	5
10	3
11	5
12	5
13	13
14	11
15	11
16	11
17	13
18	45
19	105
20	136
21	105
22	165
23	332
24	492
25	501
26	482
27	684
28	720
29	1095
30	1656
31	3273
32	3136
33	3901
34	4948
35	6674
36	7641
37	15047
38	12879
39	17217
40	38901
41	75540
42	37743
43	73594
44	84249
45	88592
46	207324
47	403493
48	710536
49	922853
50	662019

[1, 1, 0, 1, 0, 1, 1, 1, 0, 5, 3, 5, 5, 13, 11, 11, 11, 13, 45, 105, 136, 105, 165, 332, 492, 501, 482, 684, 720, 1095, 1656, 3273, 3136, 3901, 4948, 6674, 7641, 15047, 12879, 17217, 38901, 75540, 37743, 73594, 84249, 88592, 207324, 403493, 710536, 922853, 662019]

cp's OEIS Frontend

A277621 Number of pairs (a,b) such that a*b = n! and d(a) = d(b) with d = A000005 and a <= b.

Table of values

List of values