A155595 - OEIS

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A155595 as a simple table

n	a(n)
0	1
1	12
2	124
3	1338
4	14656
5	161082
6	1771624
7	19487298
8	214359136
9	2357948202
10	25937425624
11	285311672658
12	3138428380816
13	34522712152122
14	379749833599624
15	4177248169448418
16	45949729863637696
17	505447028499424842

[1,12,124,1338,14656,161082,1771624,19487298, 214359136,2357948202,25937425624,285311672658, 3138428380816,34522712152122,379749833599624, 4177248169448418,45949729863637696, 505447028499424842]