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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
OFFSET
1,2
LINKS
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
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Dec 27 2008
EXTENSIONS
More terms from R. J. Mathar, Feb 20 2009
STATUS
approved