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A149421 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 56
5 194
6 936
7 3538
8 17321
9 68903
10 339902
11 1396514
12 6919349
13 29062278
14 144387889
15 616244809
16 3067086814
17 13251144642
18 66031397048
19 288051494440
20 1436595469141
21 6316268935590
22 31520173742537
23 139490497666088
24 696411055283854
25 3098956054640149
26 15476764066529596
27 69196679300334168

[1,1,4,12,56,194,936,3538,17321,68903,339902,
 1396514,6919349,29062278,144387889,616244809,
 3067086814,13251144642,66031397048,288051494440,
 1436595469141,6316268935590,31520173742537,
 139490497666088,696411055283854,3098956054640149,
 15476764066529596,69196679300334168]

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Last modified April 25 01:06 EDT 2024. Contains 371964 sequences. (Running on oeis4.)