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A291023 as a simple table

na(n)
00
13
24
312
424
556
6120
7264
8568
91224
102616
115576
1211832
1325032
1452792
15111048
16233016
17487880
181019448
192126280
204427320
219204168
2219107384
2339612872
2482021944
25169636296
26350457400
27723284424
281491308088
293072094664
306323146296
3113004206536
3226724240952

[0,3,4,12,24,56,120,264,568,1224,2616,5576,11832,
 25032,52792,111048,233016,487880,1019448,2126280,
 4427320,9204168,19107384,39612872,82021944,
 169636296,350457400,723284424,1491308088,
 3072094664,6323146296,13004206536,26724240952]