

A217932


a(n) = total number of binary sequences S of length n and curling number k (so S = XY^k) in which Y can be taken to have length 1.


1



2, 4, 8, 14, 28, 52, 104, 202, 402, 794, 1588, 3152, 6304, 12572, 25136, 50198, 100396, 200636, 401272, 802260, 1604488, 3208416, 6416832, 12832482, 25664962, 51327702, 102655278, 205306104, 410612208, 821215304, 1642430608, 3284843468
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