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A027660 as a simple table

na(n)
01
14
211
326
456
5112
6210
7372
8627
91012
101573
112366
123458
134928
146868
159384
1612597
1716644
1821679
1927874
2035420
2144528
2255430
2368380
2483655
25101556
26122409
27146566
28174406
29206336
30242792

[1,4,11,26,56,112,210,372,627,1012,1573,2366,3458,
 4928,6868,9384,12597,16644,21679,27874,35420,
 44528,55430,68380,83655,101556,122409,146566,
 174406,206336,242792]