login

A074035 as a simple table

na(n)
10
21
31
44
512
645
7144
8512
91813
106579
1123808
1287380
13322560
141198665
154473647
1616777216
1763160320
18238612920
19904200192
203435973836
2113089411609
2249977848925
23191219367936
24733007751680
252814749599332
2610825961287995
2741699995927744
28160842843834660

[0,1,1,4,12,45,144,512,1813,6579,23808,87380,
 322560,1198665,4473647,16777216,63160320,
 238612920,904200192,3435973836,13089411609,
 49977848925,191219367936,733007751680,
 2814749599332,10825961287995,41699995927744,
 160842843834660]