A153928 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A153928 as a simple table

n	a(n)
0	1
1	2
2	2
3	3
4	3
5	4
6	4
7	11
8	13
9	23
10	52
11	78
12	125
13	442
14	560
15	1364
16	4023
17	8112
18	18507
19	78876
20	143191
21	474516
22	1865001
23	4873926
24	14609812
25	86022947
26	196603644
27	883908229
28	4638184260
29	15946489644
30	63408340357

[1,2,2,3,3,4,4,11,13,23,52,78,125,442,560,1364, 4023,8112,18507,78876,143191,474516,1865001, 4873926,14609812,86022947,196603644,883908229, 4638184260,15946489644,63408340357]