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A203980 as a simple table

na(n)
1384
25184
369984
4956448
513071456
6178855776
72447270496
833489653472
9458288894304
106271519652064
1185823503984224
121174465206026208
1316072153386090336
14219941927082883296
153009830115907061856

[384,5184,69984,956448,13071456,178855776,
 2447270496,33489653472,458288894304,6271519652064,
 85823503984224,1174465206026208,16072153386090336,
 219941927082883296,3009830115907061856]