A261727 - 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

A261727 as a simple table

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	3
7	0
8	0
9	0
10	25
11	46
12	90
13	172
14	141
15	275
16	601
17	1102
18	2199
19	4150

[1,0,0,2,0,3,0,0,0,25,46,90,172,141,275,601,1102, 2199,4150]

[1,0,0,2,0,3,0,0,0,25,46,90,172,141,275,601,1102,
 2199,4150]