login

A000183 as a simple table

na(n)
10
20
30
41
52
620
7144
81265
912072
10126565
111445100
1217875140
13238282730
143407118041
1552034548064
16845569542593
1714570246018686
18265397214435860
195095853023109484
20102877234050493609
212178674876680100744
2248296053720501168037
231118480911876659396600

[0,0,0,1,2,20,144,1265,12072,126565,1445100,
 17875140,238282730,3407118041,52034548064,
 845569542593,14570246018686,265397214435860,
 5095853023109484,102877234050493609,
 2178674876680100744,48296053720501168037,
 1118480911876659396600]