A240481 - OEIS

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A240481 as a simple table

n	a(n)
1	16
2	264
3	2753
4	29084
5	306749
6	3229199
7	33986995
8	357678069
9	3764378216
10	39618451066
11	416967572821
12	4388410582280
13	46186206308887
14	486090724065878
15	5115903842989972
16	53842772071906540
17	566672906942431901

[16,264,2753,29084,306749,3229199,33986995, 357678069,3764378216,39618451066,416967572821, 4388410582280,46186206308887,486090724065878, 5115903842989972,53842772071906540, 566672906942431901]