login

A307251 as a simple table

na(n)
11
23
37
421
556
663
7168
8252
9504
10819
112184
123276
136552
1415561
1532760
1662244
17124488
18482391
19622440
201929564
213859128
2217848467
2319295640
2471393868
25142787736
26713938680
273069936324
286139872648
2930699363240
30187266115764
31337692995640
32374532231528

[1,3,7,21,56,63,168,252,504,819,2184,3276,6552,
 15561,32760,62244,124488,482391,622440,1929564,
 3859128,17848467,19295640,71393868,142787736,
 713938680,3069936324,6139872648,30699363240,
 187266115764,337692995640,374532231528]