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

Author

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

Keywords

• nonn

Links

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

Crossrefs

Cf. A284116, A291067, A291781.