A025132 - 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

A025132 as a simple table

n	a(n)
2	1
3	12
4	119
5	1090
6	9592
7	82432
8	697615
9	5841606
10	48541826
11	401049352
12	3298721384
13	27037279984
14	220976019552
15	1801829443072
16	14663530220175
17	119138596786414
18	966631388383438
19	7833369734693512

[1,12,119,1090,9592,82432,697615,5841606,48541826, 401049352,3298721384,27037279984,220976019552, 1801829443072,14663530220175,119138596786414, 966631388383438,7833369734693512]