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A115605 as a simple table

n a(n)
0 0
1 0
2 2
3 7
4 31
5 128
6 549
7 2315
8 9826
9 41594
10 176242
11 746496
12 3162334
13 13395658
14 56745250
15 240376201
16 1018250793
17 4313378176
18 18271765435
19 77400436781
20 327873517634
21 1388894499108
22 5883451527348
23 24922700587008

[0,0,2,7,31,128,549,2315,9826,41594,176242,746496,
 3162334,13395658,56745250,240376201,1018250793,
 4313378176,18271765435,77400436781,327873517634,
 1388894499108,5883451527348,24922700587008]

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Last modified April 24 05:49 EDT 2024. Contains 371918 sequences. (Running on oeis4.)