A291781 Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate in a cycle.

0, 0, 4, 12, 16, 32, 64, 128, 384, 704, 896, 2304, 4608, 7680, 16384, 36864, 65536, 143360, 303104, 565248, 1245184, 2473984, 4521984, 9961472, 19070976, 35389440, 78643200, 154664960, 289931264, 635437056, 1309671424, 2503999488, 5280628736

Offset

1,3

Links

Don Reble, Table of n, a(n) for n = 1..60

Crossrefs

Cf. A284116, A291067, A291780.

Sequence in context: A228274 A353793 A273501 * A348342 A348273 A253122

Adjacent sequences: A291778 A291779 A291780 * A291782 A291783 A291784

Keyword

nonn

Author

Don Reble and N. J. A. Sloane, Sep 01 2017

Status

approved