login

A251710 as a simple table

na(n)
00
10
20
30
40
51
60
71
82
94
108
1116
1232
1363
14126
15251
16500
17996
181984
193952
207872
2115681
2231236
2362221
24123942
25246888
26491792
27979632
281951392
293887103
307742970
3115423719
3230723496
3361200104
34121908416
35242837200
36483723008
37963558913
381919374856
393823325993

[0,0,0,0,0,1,0,1,2,4,8,16,32,63,126,251,500,996,
 1984,3952,7872,15681,31236,62221,123942,246888,
 491792,979632,1951392,3887103,7742970,15423719,
 30723496,61200104,121908416,242837200,483723008,
 963558913,1919374856,3823325993]