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.

Showing 1-2 of 2 results.

A200440 Record values in A200506.

Original entry on oeis.org

0, 5, 9, 63, 192, 259, 1421, 3007, 9653
Offset: 0

Views

Author

M. F. Hasler, Nov 18 2011

Keywords

Comments

Larger values of A200506(n) can only occur for n=0, 1 and 2 (mod 5).

A201122 Differences between odd powers of 6 and the next smaller square.

Original entry on oeis.org

2, 20, 32, 95, 3420, 8847, 89927, 494576, 1347932, 48525552, 265807127, 682379927, 3237653360, 52571448911, 356954431580, 1333226567615, 6534477744687, 69394484050880, 10500704463815, 378025360697340, 13608912985104240, 60046182811381232, 227226500274052935, 442409686123219952, 15926748700435918272
Offset: 1

Views

Author

Hugo Pfoertner, Nov 27 2011

Keywords

Examples

			a(1)=6^1-2^2=2, a(2)=6^3-14^2=216-196=20, a(3)=6^5-88^2=7776-7744=32

Links

Crossrefs

Cf. A051217, A200440, A200506

Programs

  • Mathematica
    #-Floor[Sqrt[#]]^2&/@(6^Range[1,51,2]) (* Harvey P. Dale, Aug 12 2012 *)

Formula

a(n)=6^(2*n-1) - floor(sqrt(6^(2*n-1)))^2
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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