A007823 A007824(n)/16.

1, 2, 5, 14, 45, 186, 945, 5778, 44037, 403470, 4344877, 56072378, 793804721, 12734185106, 229632768005, 4628786367502, 105803768420397, 2626282179198138, 71539181027191729, 2076395667668755090, 65704452165048754181

Offset: 0

Author

Ralph Buchholz [ ralph(AT)defcen.gov.au ], Leisa Condie

Keywords

• nonn

Comments

Previous name was: For N=Sum a(i).2^i, where the a(i) are binary, define a "derivative" D(N)/D(2)=Sum i.a(i).2^(i-1); sequence gives n-th derivative of 16 (divided by 16) (cf A007824).

Formula

a(n) = A007824(n)/16. - Michel Marcus, Jul 18 2013

Extensions

Edited by Michel Marcus, Jul 18 2013