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A318946 as a simple table

na(n)
00
10
20
31
45
519
664
7201
8603
91752
104973
1113871
1238176
13103985
14280947
15754216
162014469
175358823
1814209456
1937580841
2099188427
21261360696
22687777245
231808000351
244748806720
2512464634209
2632699621859
2785747477576
28224777691893
29589072137367
301543445353168

[0,0,0,1,5,19,64,201,603,1752,4973,13871,38176,
 103985,280947,754216,2014469,5358823,14209456,
 37580841,99188427,261360696,687777245,1808000351,
 4748806720,12464634209,32699621859,85747477576,
 224777691893,589072137367,1543445353168]