A147434 - 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

A147434 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	5
9	17
10	31
11	51
12	113
13	291
14	823
15	2647
16	8411
17	31311
18	121645
19	537901
20	2460285
21	12092291
22	63560047
23	371846157
24	2296989649

[1,1,1,1,1,1,1,5,17,31,51,113,291,823,2647,8411, 31311,121645,537901,2460285,12092291,63560047, 371846157,2296989649]