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A264472 as a simple table

na(n)
10
28
316
4120
5456
62232
710116
845792
9212112
10960336
114418388
1220134008
1392208780
14421315344
151926779076
168809428456
1740277366640
18184164908040
19842016117672
203849965354232
2117602701446772
2280483933441520
23367989633268848

[0,8,16,120,456,2232,10116,45792,212112,960336,
 4418388,20134008,92208780,421315344,1926779076,
 8809428456,40277366640,184164908040,842016117672,
 3849965354232,17602701446772,80483933441520,
 367989633268848]