A291780 Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate at the empty word.

2, 4, 4, 4, 16, 32, 64, 128, 128, 320, 1152, 1792, 3584, 8704, 16384, 28672, 65536, 118784, 221184, 483328, 851968, 1720320, 3866624, 6815744, 14483456, 31719424, 55574528, 113770496, 246939648, 438304768, 837812224, 1790967808, 3309305856

Offset

1,1

Links

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

Crossrefs

Cf. A284116, A291067, A291781.

Sequence in context: A221564 A134188 A140295 * A070529 A009145 A009292

Adjacent sequences: A291777 A291778 A291779 * A291781 A291782 A291783

Keyword

nonn

Author

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

Status

approved