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A261480 as a simple table

na(n)
41
50
63
77
87
921
1050
1177
12164
13364
14672
151330
162787
175474
1810797
1921945
2043841
2187031
22174812
23350175
24698302
251397550
262798250
275591460
2811181661
2922374660
3044740503
3189467147
32178965787
33357927801
34715796390
351431659537
362863370744
375726556304
3811453194452

[1,0,3,7,7,21,50,77,164,364,672,1330,2787,5474,
 10797,21945,43841,87031,174812,350175,698302,
 1397550,2798250,5591460,11181661,22374660,
 44740503,89467147,178965787,357927801,715796390,
 1431659537,2863370744,5726556304,11453194452]