login

A153987 as a simple table

na(n)
01
11
22
33
45
512
633
797
8381
91490
107757
1142774
12307960
132294754
1422718581
15231171797
163121763126
1743651298703
18807916379400
1915440457456928
20391605380566734
2110243338678890245
22355535039683009851

[1,1,2,3,5,12,33,97,381,1490,7757,42774,307960,
 2294754,22718581,231171797,3121763126,43651298703,
 807916379400,15440457456928,391605380566734,
 10243338678890245,355535039683009851]