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A056116 as a simple table

na(n)
01
110
2121
31452
417424
5209088
62509056
730108672
8361304064
94335648768
1052027785216
11624333422592
127492001071104
1389904012853248
141078848154238976
1512946177850867712
16155354134210412544

[1,10,121,1452,17424,209088,2509056,30108672,
 361304064,4335648768,52027785216,624333422592,
 7492001071104,89904012853248,1078848154238976,
 12946177850867712,155354134210412544]