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A284458 as a simple table

na(n)
01
10
22
3156
416920
52764880
6650696400
7210105425628
889425255439744
948588905856409920
1032845298636854828800
1127047610425293718239100
1226664178085975252011318272
1331009985808408471580603417296
1442017027730087624384021945067520

[1,0,2,156,16920,2764880,650696400,210105425628,
 89425255439744,48588905856409920,
 32845298636854828800,27047610425293718239100,
 26664178085975252011318272,
 31009985808408471580603417296,
 42017027730087624384021945067520]