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A072856 as a simple table

na(n)
01
11
22
36
424
5120
6504
71902
86902
925231
1095401
11365116
121396948
135316192
1420135712
1576227216
16288878956
171095937420
184159450913
1915783649241
2059878012558
21227128287882
22861543171080
233268198646496
2412398132725784
2547033439463906
26178423731589482

[1,1,2,6,24,120,504,1902,6902,25231,95401,365116,
 1396948,5316192,20135712,76227216,288878956,
 1095937420,4159450913,15783649241,59878012558,
 227128287882,861543171080,3268198646496,
 12398132725784,47033439463906,178423731589482]