login

A337898 as a simple table

na(n)
11
210
355
4200
5560
61316
72730
85160
99075
1015070
1123881
1236400
1353690
1477000
15107780
16147696
17198645
18262770
19342475
20440440
21559636
22703340
23875150
241079000
251319175
261600326
271927485
282306080
292741950
303241360

[1,10,55,200,560,1316,2730,5160,9075,15070,23881,
 36400,53690,77000,107780,147696,198645,262770,
 342475,440440,559636,703340,875150,1079000,
 1319175,1600326,1927485,2306080,2741950,3241360]