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A277556 as a simple table

n a(n)
0 1
1 1
2 0
3 2
4 2
5 14
6 42
7 244
8 1208
9 7930
10 52710
11 405850
12 3310702
13 29742388
14 285103536
15 2943395390
16 32318674810
17 377660270510
18 4668433604250
19 60946384750028
20 837286564780496
21 12079835055678770
22 182562305754119886
23 2884622329374990250
24 47559525570125238782

[1,1,0,2,2,14,42,244,1208,7930,52710,405850,
 3310702,29742388,285103536,2943395390,32318674810,
 377660270510,4668433604250,60946384750028,
 837286564780496,12079835055678770,
 182562305754119886,2884622329374990250,
 47559525570125238782]

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Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)