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A291780 Consider the Watanabe tag system defined in A291067; a(n) = number of binary words of length n which terminate at the empty word. 9
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 18 15:48 EDT 2020. Contains 337169 sequences. (Running on oeis4.)