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A047025 as a simple table

na(n)
31
43
57
619
737
899
9586
101144
115452
1222610
13112227
14482885
151978069
168394471
1734646088
18140372604
19572795825
202320299903
219330259482
2237549205868
23150740987631
24603268047310
252413279250137
269643525728588
2738481447864172

[1,3,7,19,37,99,586,1144,5452,22610,112227,482885,
 1978069,8394471,34646088,140372604,572795825,
 2320299903,9330259482,37549205868,150740987631,
 603268047310,2413279250137,9643525728588,
 38481447864172]