A098661 - 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

A098661 as a simple table

n	a(n)
1	2
2	21
3	134
4	751
5	2628
6	11381
7	63898
8	318941
9	1851114
10	11138635
11	59638094
12	413291157
13	2550007678
14	20721795665
15	132517178106

[2,21,134,751,2628,11381,63898,318941,1851114, 11138635,59638094,413291157,2550007678, 20721795665,132517178106]