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A274312 as a simple table

na(n)
11
21
31
42
52
63
74
86
97
1010
1113
1218
1323
1431
1540
1654
1769
1891
19118
20155
21199
22260
23334
24433

[1,1,1,2,2,3,4,6,7,10,13,18,23,31,40,54,69,91,118,
 155,199,260,334,433]