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A056399 as a simple table

na(n)
10
20
30
40
51
69
726
8299
91183
1010701
1124736
12349241
13626053
146680979
1526364610
16137247254
17353304459
184826418027
198199440662
2093679529503
21315943737331
221913783074461
234382586624256
2460629067776483

[0,0,0,0,1,9,26,299,1183,10701,24736,349241,
 626053,6680979,26364610,137247254,353304459,
 4826418027,8199440662,93679529503,315943737331,
 1913783074461,4382586624256,60629067776483]