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A308351 as a simple table

na(n)
11
24
318
4128
51090
611232
7134806
81849696
928550538
10489656720
119237631150
12190115847792
134238752713442
14101775333547552
152618244556598310
1671846664091504064
172094748778352174202
1864666725024407102064
192107224874854168508126
2072279858915240296971600

[1,4,18,128,1090,11232,134806,1849696,28550538,
 489656720,9237631150,190115847792,4238752713442,
 101775333547552,2618244556598310,
 71846664091504064,2094748778352174202,
 64666725024407102064,2107224874854168508126,
 72279858915240296971600]