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A264041 as a simple table

na(n)
11
23
36
410
516
621
729
836
946
1055
1168
1278
1393
14105
15122
16136
17156
18171
19193
20210
21234
22253
23280
24300
25329
26351

[1,3,6,10,16,21,29,36,46,55,68,78,93,105,122,136,
 156,171,193,210,234,253,280,300,329,351]