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A010907 as a simple table

n a(n)
0 4
1 19
2 90
3 426
4 2016
5 9541
6 45154
7 213697
8 1011348
9 4786332
10 22651920
11 107203069
12 507352048
13 2401107571
14 11363544486
15 53779407822
16 254517831936
17 1204537747753
18 5700626846950
19 26978935702753
20 127681216679304
21 604267465267128
22 2859772009358880
23 13534231802298265
24 64052459384483260
25 303136344428812723
26 1434630991482656082
27 6789572149788327282

[4,19,90,426,2016,9541,45154,213697,1011348,
 4786332,22651920,107203069,507352048,2401107571,
 11363544486,53779407822,254517831936,
 1204537747753,5700626846950,26978935702753,
 127681216679304,604267465267128,2859772009358880,
 13534231802298265,64052459384483260,
 303136344428812723,1434630991482656082,
 6789572149788327282]

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Last modified March 29 08:44 EDT 2024. Contains 371267 sequences. (Running on oeis4.)