A153499 a(n) is the number whose binary expansion is A153500(n).

1, 5, 17, 85, 365, 1365, 5285, 21845, 88757, 349525, 1387157, 5592405, 22457045, 89478485, 357214805, 1431655765, 5732215637, 22906492245, 91581229397, 366503875925, 1466373418325, 5864062014805, 23453384746325, 93824992236885

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Formula

Empirical g.f.: -x*(64*x^6-80*x^5+16*x^4-20*x^3-6*x^2-1) / ((x-1)*(4*x-1)*(2*x^2+1)*(8*x^2+1)). - Colin Barker, Sep 17 2013

Crossrefs

Cf. A135576, A153497, A153498, A153500.

Sequence in context: A149756 A036756 A149757 * A012782 A026685 A089923

Adjacent sequences: A153496 A153497 A153498 * A153500 A153501 A153502

Keyword

easy,nonn

Author

Omar E. Pol, Dec 27 2008

Extensions

More terms from R. J. Mathar, Feb 20 2009

Status

approved