A119551 - cp's OEIS frontend

A119551 Number of ordered finite sequences a_1 <= a_2 <= ... <= a_n of length n of positive integers less than or equal to n whose product is n! and whose sum is n * (n + 1) / 2.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	6
11	6
12	22
13	22
14	60
15	159
16	377
17	377
18	1007
19	1007
20	2867
21	8147
22	22403
23	22403
24	67808
25	176128
26	495053
27	1362240
28	4210266
29	4210266
30	14223808
31	14223808
32	42235255
33	129279396
34	370630653
35	1178215490

[1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 6, 6, 22, 22, 60, 159, 377, 377, 1007, 1007, 2867, 8147, 22403, 22403, 67808, 176128, 495053, 1362240, 4210266, 4210266, 14223808, 14223808, 42235255, 129279396, 370630653, 1178215490]

cp's OEIS Frontend

A119551 Number of ordered finite sequences a_1 <= a_2 <= ... <= a_n of length n of positive integers less than or equal to n whose product is n! and whose sum is n * (n + 1) / 2.

Table of values

List of values