A101531 - 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

A101531 as a simple table

n	a(n)
1	0
2	2
3	3
4	9
5	21
6	39
7	53
8	80
9	83
10	105
11	192
12	596
13	680
14	1362
15	1875
16	4023
17	14162
18	18732
19	20841
20	23727
21	26418
22	31449
23	44693
24	64766

[0,2,3,9,21,39,53,80,83,105,192,596,680,1362,1875, 4023,14162,18732,20841,23727,26418,31449,44693, 64766]