login

A247531 as a simple table

na(n)
1553
21033
32009
43997
58051
616683
734695
872269
9150677
10318575
11671847
121413661
132970293
146314241
1513372035
1628225763
1759454011
18126633283
19268599173
20567619549
211196758327
222551010159
235414437825
2411447235523
2524144688307

[553,1033,2009,3997,8051,16683,34695,72269,150677,
 318575,671847,1413661,2970293,6314241,13372035,
 28225763,59454011,126633283,268599173,567619549,
 1196758327,2551010159,5414437825,11447235523,
 24144688307]