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A145129 as a simple table

na(n)
01
15
218
356
4155
5386
6876
71836
83597
96655
1011726
1119812
1232279
1350948
1478200
15117096
16171513
17246297
18347434
19482240
20659571
21890054
221186340
231563380
242038725
252632851
263369510
274276108
285384111
296729480
308353136
3110301456
3212626801
3315388077
3418651330

[1,5,18,56,155,386,876,1836,3597,6655,11726,19812,
 32279,50948,78200,117096,171513,246297,347434,
 482240,659571,890054,1186340,1563380,2038725,
 2632851,3369510,4276108,5384111,6729480,8353136,
 10301456,12626801,15388077,18651330]