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A266573 as a simple table

na(n)
12
25
315
4109
5574
62840
713767
871646
9390862
102170370
1111989812
1266094738
13366119221
142044786962
1511503587136
1665003352026
17368281990242
182091514533360
1911909843102866
2068009104297282
21389348569168108
222233795881384252

[2,5,15,109,574,2840,13767,71646,390862,2170370,
 11989812,66094738,366119221,2044786962,
 11503587136,65003352026,368281990242,
 2091514533360,11909843102866,68009104297282,
 389348569168108,2233795881384252]