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A090965 as a simple table

na(n)
01
14
228
3208
41552
511584
686464
7645376
84817152
935955712
10268377088
112003193856
1214952042496
13111603564544
14833020346368
156217748512768
1646409906716672
17346408259682304
182585626450591744
1919299378566004736

[1,4,28,208,1552,11584,86464,645376,4817152,
 35955712,268377088,2003193856,14952042496,
 111603564544,833020346368,6217748512768,
 46409906716672,346408259682304,2585626450591744,
 19299378566004736]