cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A016841 a(n) = (4n+3)^5.

Original entry on oeis.org

243, 16807, 161051, 759375, 2476099, 6436343, 14348907, 28629151, 52521875, 90224199, 147008443, 229345007, 345025251, 503284375, 714924299, 992436543, 1350125107, 1804229351, 2373046875, 3077056399, 3939040643, 4984209207, 6240321451, 7737809375, 9509900499, 11592740743
Offset: 0

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  • Mathematica
    (4*Range[0,30]+3)^5 (* or *) LinearRecurrence[{6,-15,20,-15,6,-1},{243,16807,161051,759375,2476099,6436343},30] (* Harvey P. Dale, Aug 11 2014 *)

Formula

a(0)=243, a(1)=16807, a(2)=161051, a(3)=759375, a(4)=2476099, a(5)=6436343, a(n)=6*a(n-1)-15*a(n-2)+20*a(n-3)-15*a(n-4)+6*a(n-5)-a(n-6). - Harvey P. Dale, Aug 11 2014
From Amiram Eldar, Apr 24 2023: (Start)
a(n) = A004767(n)^5.
Sum_{n>=0} 1/a(n) = 31*zeta(5)/64 - 5*Pi^5/3072. (End)