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A151519 as a simple table

n a(n)
1 1
2 4
3 6
4 22
5 56
6 198
7 624
8 2182
9 7448
10 26319
11 92826
12 332181
13 1192845
14 4315845
15 15678200
16 57227380
17 209623109
18 770516966
19 2840466846
20 10499678185
21 38905008340
22 144475534207

[1,4,6,22,56,198,624,2182,7448,26319,92826,332181,
 1192845,4315845,15678200,57227380,209623109,
 770516966,2840466846,10499678185,38905008340,
 144475534207]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)