login

A128528 as a simple table

na(n)
11
21
31
42
56
621
7112
8853
911117
10261080
1111716571
121006700565
13164159
14422662
151295037
164272969
1712780650
1823303620
1964379033
20189490870
21556338383
221448500351
232871171041
247624849834
2520914847051
2655714746424
27133364472272
28277569288280
29708402263349
301827946074290
314530654263579
3210312511072061
3322005420425661
3454057174050076
35132409684714581

[1,1,1,2,6,21,112,853,11117,261080,11716571,
 1006700565,164159,422662,1295037,4272969,12780650,
 23303620,64379033,189490870,556338383,1448500351,
 2871171041,7624849834,20914847051,55714746424,
 133364472272,277569288280,708402263349,
 1827946074290,4530654263579,10312511072061,
 22005420425661,54057174050076,132409684714581]