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A019138 as a simple table

n a(n)
3 0
4 2
5 3
6 6
7 12
8 23
9 26
10 108
11 196
12 457
13 1194
14 2941
15 6996
16 18466
17 44700
18 115222
19 290209
20 743380
21 1902091
22 4927667
23 12687155
24 33111341
25 86087218
26 225487899
27 590898052
28 1554720401
29 4094006743
30 10817803375
31 28602497093

[0,2,3,6,12,23,26,108,196,457,1194,2941,6996,
 18466,44700,115222,290209,743380,1902091,4927667,
 12687155,33111341,86087218,225487899,590898052,
 1554720401,4094006743,10817803375,28602497093]

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Last modified April 24 14:18 EDT 2024. Contains 371960 sequences. (Running on oeis4.)