A166599 - 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

A166599 as a simple table

n	a(n)
0	1
1	18
2	306
3	5202
4	88434
5	1503378
6	25557426
7	434476242
8	7386096114
9	125563633938
10	2134581776946
11	36287890208082
12	616894133537241
13	10487200270130496
14	178282404592174368
15	3030800878066215168
16	51523614927112923360

[1,18,306,5202,88434,1503378,25557426,434476242, 7386096114,125563633938,2134581776946, 36287890208082,616894133537241,10487200270130496, 178282404592174368,3030800878066215168, 51523614927112923360]