login

A037951 as a simple table

na(n)
00
10
20
31
41
55
66
721
828
984
10120
11330
12495
131287
142002
155005
168008
1719448
1831824
1975582
20125970
21293930
22497420
231144066
241961256
254457400
267726160
2717383860
2830421755
2967863915
30119759850
31265182525

[0,0,0,1,1,5,6,21,28,84,120,330,495,1287,2002,
 5005,8008,19448,31824,75582,125970,293930,497420,
 1144066,1961256,4457400,7726160,17383860,30421755,
 67863915,119759850,265182525]