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A111757 as a simple table

n a(n)
1 0
2 1
3 0
4 1
5 0
6 2
7 0
8 4
9 0
10 13
11 0
12 48
13 0
14 238
15 0
16 1325
17 0
18 8297
19 0
20 54519
21 0
22 373363
23 0
24 2621872
25 0
26 18797682
27 0
28 136969519
29 0
30 1011903735
31 0
32 7564219361
33 0
34 57129086391
35 0
36 435394899361
37 0
38 3345082819597
39 0
40 25885718422329
41 0
42 201619294539406
43 0
44 1579629974876090

[0,1,0,1,0,2,0,4,0,13,0,48,0,238,0,1325,0,8297,0,
 54519,0,373363,0,2621872,0,18797682,0,136969519,0,
 1011903735,0,7564219361,0,57129086391,0,
 435394899361,0,3345082819597,0,25885718422329,0,
 201619294539406,0,1579629974876090]

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)