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A153497 a(n) is the number whose binary expansion is A153498(n). 5
1, 7, 21, 73, 341, 1453, 5461, 21157, 87381, 354997, 1398101, 5548693, 22369621, 89828053, 357913941, 1428859477, 5726623061, 22928862037, 91625968981, 366324918613, 1466015503701, 5865493671253, 23456248059221, 93813538989397 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..500

Index entries for linear recurrences with constant coefficients, signature (5, -14, 50, -56, 80, -64).

FORMULA

From R. J. Mathar, Feb 20 2009: (Start)

a(n) = 5*a(n-1) - 14*a(n-2) + 50*a(n-3) - 56*a(n-4) + 80*a(n-5) - 64*a(n-6).

G.f.: x*(1 +2x +16x^3 -24x^4 +32x^5)/((1-x)*(1-4x)*(1+2x^2)*(1+8x^2)). (End)

MATHEMATICA

LinearRecurrence[{5, -14, 50, -56, 80, -64}, {1, 7, 21, 73, 341, 1453}, 30] (* Harvey P. Dale, Nov 21 2012 *)

CROSSREFS

Cf. A135576, A153498, A153499, A153500.

Sequence in context: A146533 A208534 A135576 * A146247 A241431 A147003

Adjacent sequences:  A153494 A153495 A153496 * A153498 A153499 A153500

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Dec 27 2008

EXTENSIONS

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

STATUS

approved

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Last modified March 23 01:23 EDT 2017. Contains 283901 sequences.