login

A231998 as a simple table

na(n)
14
26
316
439
581
6168
7361
8780
91681
103612
117744
1216620
1335721
1476755
15164836
16354006
17760384
181633275
193508129
207535088
2116184529
2234762680
2374666881
24160377096
25344473600
26739894200
271589218225
283413480691
297331811876
3015747991350

[4,6,16,39,81,168,361,780,1681,3612,7744,16620,
 35721,76755,164836,354006,760384,1633275,3508129,
 7535088,16184529,34762680,74666881,160377096,
 344473600,739894200,1589218225,3413480691,
 7331811876,15747991350]