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A077400 as a simple table

na(n)
00
121
2105
35460
426796
51386945
66806205
7352278696
81728749400
989477401965
10439095541521
1122726907820540
12111528538797060
135772545109015321
1428327809758911845
151466203730782071120
167195152150224811696
17372409975073537049285
181827540318347343259065

[0,21,105,5460,26796,1386945,6806205,352278696,
 1728749400,89477401965,439095541521,
 22726907820540,111528538797060,5772545109015321,
 28327809758911845,1466203730782071120,
 7195152150224811696,372409975073537049285,
 1827540318347343259065]