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A053639 as a simple table

na(n)
14
24
36
48
513
622
737
864
9114
10205
11373
12683
131261
142341
154370
168192
1715421
1829128
1955189
20104858
21199729
22381301
23729445
241398102
252684355
265162221
279942054
2819173962
2937025581
3071582789
31138547333
32268435456
33520602097

[4,4,6,8,13,22,37,64,114,205,373,683,1261,2341,
 4370,8192,15421,29128,55189,104858,199729,381301,
 729445,1398102,2684355,5162221,9942054,19173962,
 37025581,71582789,138547333,268435456,520602097]