A237505 - 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

A237505 as a simple table

n	a(n)
1	328
2	1724
3	9108
4	50876
5	284368
6	1553960
7	8478776
8	46757986
9	257959884
10	1416477192
11	7776398684
12	42785177212
13	235416777178
14	1294039386286
15	7112841515544
16	39114977306998
17	215104356057896
18	1182657379537690

[328,1724,9108,50876,284368,1553960,8478776, 46757986,257959884,1416477192,7776398684, 42785177212,235416777178,1294039386286, 7112841515544,39114977306998,215104356057896, 1182657379537690]