A249981 - OEIS

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A249981 as a simple table

n	a(n)
1	16
2	154
3	1744
4	19574
5	237348
6	2886016
7	35380112
8	446342246
9	5529256528
10	70948896558
11	887325882364
12	11494042429460
13	144804789146232
14	1887744535279984
15	23911022925991996
16	313197804513008262

[16,154,1744,19574,237348,2886016,35380112, 446342246,5529256528,70948896558,887325882364, 11494042429460,144804789146232,1887744535279984, 23911022925991996,313197804513008262]