A021954 - OEIS

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A021954 as a simple table

n	a(n)
0	1
1	24
2	387
3	5278
4	65793
5	776412
6	8835919
7	98027226
8	1067371965
9	11457966520
10	121639285131
11	1279935023094
12	13371252146617
13	138859728185748
14	1434922500247623
15	14766153399643282
16	151413895297559349

[1,24,387,5278,65793,776412,8835919,98027226, 1067371965,11457966520,121639285131,1279935023094, 13371252146617,138859728185748,1434922500247623, 14766153399643282,151413895297559349]