A113874 - cp's OEIS frontend

A113874 a(3n) = a(3n-1) + a(3n-2), a(3n+1) = 2n*a(3n) + a(3n-1), a(3n+2) = a(3n+1) + a(3n).

n	a(n)
0	1
1	0
2	1
3	1
4	3
5	4
6	7
7	32
8	39
9	71
10	465
11	536
12	1001
13	8544
14	9545
15	18089
16	190435
17	208524
18	398959
19	4996032
20	5394991
21	10391023
22	150869313
23	161260336
24	312129649
25	5155334720
26	5467464369
27	10622799089
28	196677847971
29	207300647060

[1, 0, 1, 1, 3, 4, 7, 32, 39, 71, 465, 536, 1001, 8544, 9545, 18089, 190435, 208524, 398959, 4996032, 5394991, 10391023, 150869313, 161260336, 312129649, 5155334720, 5467464369, 10622799089, 196677847971, 207300647060]

cp's OEIS Frontend

A113874 a(3n) = a(3n-1) + a(3n-2), a(3n+1) = 2n*a(3n) + a(3n-1), a(3n+2) = a(3n+1) + a(3n).

Table of values

List of values