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A375449 as a simple table

na(n)
11
23
315
4114
51230
617541
7310401
86502368
9156119778
104202894190
11124940121966
124056054468282
13142598505603138
145393588598473229
15218309634723396555
169413799845705265408
17430826174378500622916
1820856810739070097320814
191064963403446152512517140
2057204475911565427208990300

[1,3,15,114,1230,17541,310401,6502368,156119778,
 4202894190,124940121966,4056054468282,
 142598505603138,5393588598473229,
 218309634723396555,9413799845705265408,
 430826174378500622916,20856810739070097320814,
 1064963403446152512517140,
 57204475911565427208990300]