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A067503 as a simple table

na(n)
11
26
3279936
41679616
510077696
660466176
713060694016
84849687664788584363858837602739217760256
9174588755932389037098918153698611839369216

[1,6,279936,1679616,10077696,60466176,13060694016,
 4849687664788584363858837602739217760256,
 174588755932389037098918153698611839369216]