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A071803 as a simple table

na(n)
254
31140
426550
5605556
614330736
7340860960
88264889270
9201651836100
104978317147804
11123546256876224
123090501687886704
1377632745316063840
141961313438507566400
1549717549985405892480
161265749551338006549430
1732312920048897640674500
18827693426702217868006500

[54,1140,26550,605556,14330736,340860960,
 8264889270,201651836100,4978317147804,
 123546256876224,3090501687886704,
 77632745316063840,1961313438507566400,
 49717549985405892480,1265749551338006549430,
 32312920048897640674500,827693426702217868006500]