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A026763 as a simple table

na(n)
21
37
438
5190
6918
74365
820594
996804
10454362
112132121
1210010203
1347042042
14221337726
151042837195
164920447410
1723250646651
18110029743083
19521462857972
202474929099976
2111762845907633
2255982738983975
23266789302547057

[1,7,38,190,918,4365,20594,96804,454362,2132121,
 10010203,47042042,221337726,1042837195,4920447410,
 23250646651,110029743083,521462857972,
 2474929099976,11762845907633,55982738983975,
 266789302547057]