login

A215985 as a simple table

na(n)
51
61
73
86
913
1026
1155
12112
13238
14510
151117
162498
175712
1813322
1931643
2076455
21187382
22465393
231168966
242966298
257594035
2619597653
2750933434
28133224112
29350477003
30926855665
312462830565
326572892862
3317612586165
3447369774428
35127841265076
36346120109957

[1,1,3,6,13,26,55,112,238,510,1117,2498,5712,
 13322,31643,76455,187382,465393,1168966,2966298,
 7594035,19597653,50933434,133224112,350477003,
 926855665,2462830565,6572892862,17612586165,
 47369774428,127841265076,346120109957]