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A072856 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 504
7 1902
8 6902
9 25231
10 95401
11 365116
12 1396948
13 5316192
14 20135712
15 76227216
16 288878956
17 1095937420
18 4159450913
19 15783649241
20 59878012558
21 227128287882
22 861543171080
23 3268198646496
24 12398132725784
25 47033439463906
26 178423731589482

[1,1,2,6,24,120,504,1902,6902,25231,95401,365116,
 1396948,5316192,20135712,76227216,288878956,
 1095937420,4159450913,15783649241,59878012558,
 227128287882,861543171080,3268198646496,
 12398132725784,47033439463906,178423731589482]

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)