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A120490 as a simple table

na(n)
12
24
315
4101
5980
612202
7184821
83297457
967731334
101574304986
1140851766527
121170684360925
1336720042483592
141251308658130546
1546034015337733481
161818399978159990977
1776762718946972480010
183448810852242967123282

[2,4,15,101,980,12202,184821,3297457,67731334,
 1574304986,40851766527,1170684360925,
 36720042483592,1251308658130546,46034015337733481,
 1818399978159990977,76762718946972480010,
 3448810852242967123282]