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A290996 as a simple table

na(n)
01
12
24
39
422
555
6136
7330
8789
91872
104433
1110510
1224968
1359409
14141470
15336935
16802340
171910166
184546845
1910822176
2025758097
2161308650
22145928764
23347350473
24826795942
251968018151
264684451824
2711150316882
2826540849109
2963174538224
30150372815489

[1,2,4,9,22,55,136,330,789,1872,4433,10510,24968,
 59409,141470,336935,802340,1910166,4546845,
 10822176,25758097,61308650,145928764,347350473,
 826795942,1968018151,4684451824,11150316882,
 26540849109,63174538224,150372815489]