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A001657 as a simple table

n a(n)
0 1
1 8
2 104
3 1092
4 12376
5 136136
6 1514513
7 16776144
8 186135312
9 2063912136
10 22890661872
11 253854868176
12 2815321003313
13 31222272414424
14 346260798314872
15 3840089017377228
16 42587248616222024
17 472299787252290712
18 5237885063192296801
19 58089034826620525728 

[1,8,104,1092,12376,136136,1514513,16776144,
 186135312,2063912136,22890661872,253854868176,
 2815321003313,31222272414424,346260798314872,
 3840089017377228,42587248616222024,
 472299787252290712,5237885063192296801,
 58089034826620525728]

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Last modified April 23 07:16 EDT 2024. Contains 371905 sequences. (Running on oeis4.)