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A240778 as a simple table

na(n)
11
24
320
497
5459
62187
710442
849861
9238068
101136678
115427201
1225912833
13123723975
14590735140
152820536641
1613466994652
1764299801122
18307007207679
191465843189533
206998846289463
2133416841401200
22159552766705917

[1,4,20,97,459,2187,10442,49861,238068,1136678,
 5427201,25912833,123723975,590735140,2820536641,
 13466994652,64299801122,307007207679,
 1465843189533,6998846289463,33416841401200,
 159552766705917]