A291445 - cp's OEIS frontend

A291445 Number of permutations s_1,s_2,...,s_n of 1,2,...,n such that for all j=1,2,...,n, Sum_{i=1..j} s_i divides Sum_{i=1..j} s_i^3.

n	a(n)
1	1
2	2
3	6
4	12
5	30
6	78
7	186
8	414
9	912
10	2064
11	4338
12	9798
13	20106
14	40974
15	80196
16	158322
17	309414
18	615558
19	1212402
20	2417136
21	4776654
22	9497508
23	18726708
24	37056150
25	72946116
26	144230640
27	284660874
28	564451830
29	1118803818
30	2224792026
31	4420041210
32	8791590168
33	17456783136

[1, 2, 6, 12, 30, 78, 186, 414, 912, 2064, 4338, 9798, 20106, 40974, 80196, 158322, 309414, 615558, 1212402, 2417136, 4776654, 9497508, 18726708, 37056150, 72946116, 144230640, 284660874, 564451830, 1118803818, 2224792026, 4420041210, 8791590168, 17456783136]

cp's OEIS Frontend

A291445 Number of permutations s_1,s_2,...,s_n of 1,2,...,n such that for all j=1,2,...,n, Sum_{i=1..j} s_i divides Sum_{i=1..j} s_i^3.

Table of values

List of values