login

A324407 as a simple table

na(n)
11
21
31
42
53
66
710
821
938
1080
11157
12336
13691
141493
153164
166900
1714880
1832647
1971212
20157069
21345216
22764666
231689978
243756879
258338405
2618593389
2741410352
2892583361
29206790477
30463400376
311037575558
322329839141
335227759707
3411759828568
3526436550400

[1,1,1,2,3,6,10,21,38,80,157,336,691,1493,3164,
 6900,14880,32647,71212,157069,345216,764666,
 1689978,3756879,8338405,18593389,41410352,
 92583361,206790477,463400376,1037575558,
 2329839141,5227759707,11759828568,26436550400]