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A276907 as a simple table

n a(n)
1 1
2 1
3 7
4 17
5 56
6 199
7 890
8 4649
9 27817
10 195946
11 1684398
12 17397323
13 208799982
14 2932164012
15 49785808832
16 1022745137705
17 24671296028079
18 695270673553051
19 23526126768837873
20 965093874912658722
21 46827415587504280547
22 2655503102769481320544
23 179856174616910379655073
24 14761130793635395568878091
25 1439881917495260610082685956
26 164363140573098989525137162900
27 22322323085863965044351721067969

[1,1,7,17,56,199,890,4649,27817,195946,1684398,
 17397323,208799982,2932164012,49785808832,
 1022745137705,24671296028079,695270673553051,
 23526126768837873,965093874912658722,
 46827415587504280547,2655503102769481320544,
 179856174616910379655073,
 14761130793635395568878091,
 1439881917495260610082685956,
 164363140573098989525137162900,
 22322323085863965044351721067969]

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Last modified December 6 08:36 EST 2022. Contains 358605 sequences. (Running on oeis4.)