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A136594 as a simple table

na(n)
01
11
22
38
426
570
6820
75152
820316
9388712
103666188
1117298908
12501805832
136256792412
1433844737292
151353617016078
1620960708128068
17137741948419428
186588092586831028
19121860622573650906
20924837580461274556

[1,1,2,8,26,70,820,5152,20316,388712,3666188,
 17298908,501805832,6256792412,33844737292,
 1353617016078,20960708128068,137741948419428,
 6588092586831028,121860622573650906,
 924837580461274556]