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A020972 as a simple table

na(n)
01
128
2529
38428
4122257
51673980
622067473
7283450636
83574941073
944501447452
10548719235857
116718924954924
1281849587868049
13993294339107644
1412020103854584081
15145151139884150092
161750035954202640785

[1,28,529,8428,122257,1673980,22067473,283450636,
 3574941073,44501447452,548719235857,6718924954924,
 81849587868049,993294339107644,12020103854584081,
 145151139884150092,1750035954202640785]