A016195 - OEIS

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A016195 as a simple table

n	a(n)
0	0
1	1
2	21
3	331
4	4641
5	61051
6	771561
7	9487171
8	114358881
9	1357947691
10	15937424601
11	185311670611
12	2138428376721
13	24522712143931
14	279749833583241
15	3177248169415651
16	35949729863572161
17	405447028499293771

[0,1,21,331,4641,61051,771561,9487171,114358881, 1357947691,15937424601,185311670611,2138428376721, 24522712143931,279749833583241,3177248169415651, 35949729863572161,405447028499293771]