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A068380 as a simple table

na(n)
13
254
3180
4378
5648
6990
71404
81890
92448
103078
113780
124554
135400
146318
157308
168370
179504
1810710
1911988
2013338
2114760
2216254
2317820
2419458
2521168
2622950
2724804
2826730
2928728
3030798
3132940
3235154
3337440
3439798
3542228
3644730
3747304
3849950

[3,54,180,378,648,990,1404,1890,2448,3078,3780,
 4554,5400,6318,7308,8370,9504,10710,11988,13338,
 14760,16254,17820,19458,21168,22950,24804,26730,
 28728,30798,32940,35154,37440,39798,42228,44730,
 47304,49950]