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A271930 as a simple table

n a(n)
1 1
2 3
3 15
4 90
5 597
6 4221
7 31185
8 237897
9 1859568
10 14816637
11 119892942
12 982565883
13 8138777166
14 68028775587
15 573078135996
16 4860507197700
17 41470162208814
18 355695498901179
19 3065210379987489
20 26525947283576640
21 230425563258798840
22 2008561878414115803
23 17563090615911038115
24 154014411705019299450
25 1354142406561753259035
26 11934928413519024726252
27 105426063390991627937457
28 933206579920813459523994
29 8276480132736299734057275
30 73535083052134446419214960

[1,3,15,90,597,4221,31185,237897,1859568,14816637,
 119892942,982565883,8138777166,68028775587,
 573078135996,4860507197700,41470162208814,
 355695498901179,3065210379987489,
 26525947283576640,230425563258798840,
 2008561878414115803,17563090615911038115,
 154014411705019299450,1354142406561753259035,
 11934928413519024726252,105426063390991627937457,
 933206579920813459523994,
 8276480132736299734057275,
 73535083052134446419214960]

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)