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A371140 as a simple table

na(n)
01
10
22
33
456
5270
65064
747040
8984416
914116032
10336538080
116589416240
12179336461248
134446985514400
14137520942168960
154112410749501600
16143445512622458880
175004065722611594240
18195260931334478223360
197762385328551718796800
20336051947630616458065920

[1,0,2,3,56,270,5064,47040,984416,14116032,
 336538080,6589416240,179336461248,4446985514400,
 137520942168960,4112410749501600,
 143445512622458880,5004065722611594240,
 195260931334478223360,7762385328551718796800,
 336051947630616458065920]