A047755 a(n) = A047752(12n+5).
0, 0, 1, 5, 26, 133, 708, 3861, 21604, 123266, 715221, 4206956, 25032840, 150413348, 911379384, 5562367173, 34164355848, 211015212580, 1309815397995, 8166460799805, 51120054233490, 321156223592865, 2024257417812240, 12797201858645100
Offset: 0
Keywords
Extensions
Edited by N. J. A. Sloane, Jan 17 2009 at the suggestion of R. J. Mathar
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