A357783 - cp's OEIS frontend

A357783 a(n) = Sum_{k=0..floor((n-1)/3)} 2^k * Stirling2(n,3*k+1).

n	a(n)
0	0
1	1
2	1
3	1
4	3
5	21
6	131
7	705
8	3515
9	17389
10	91739
11	547889
12	3746227
13	28241373
14	224124083
15	1821051233
16	15023818091
17	126366334125
18	1094358852075
19	9858890038513
20	92983173940419
21	918408372280477
22	9454438841355395
23	100728532687727329
24	1103649166937235259

[0, 1, 1, 1, 3, 21, 131, 705, 3515, 17389, 91739, 547889, 3746227, 28241373, 224124083, 1821051233, 15023818091, 126366334125, 1094358852075, 9858890038513, 92983173940419, 918408372280477, 9454438841355395, 100728532687727329, 1103649166937235259]

cp's OEIS Frontend

A357783 a(n) = Sum_{k=0..floor((n-1)/3)} 2^k * Stirling2(n,3*k+1).

Table of values

List of values