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A149318 as a simple table

na(n)
01
11
24
312
435
5137
6495
71729
87098
927593
10104531
11441615
121789017
137095763
1430558979
15127135970
16519443108
172268126113
189614119097
1940107736971
20176961174469
21760585348983
223222491238945
2314334497855854
2462275808514893
25267036125594002
261195679239707388
275239373610306369

[1,1,4,12,35,137,495,1729,7098,27593,104531,
 441615,1789017,7095763,30558979,127135970,
 519443108,2268126113,9614119097,40107736971,
 176961174469,760585348983,3222491238945,
 14334497855854,62275808514893,267036125594002,
 1195679239707388,5239373610306369]