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.

A125229 a(n) = j such that i^j is maximized subject to i+j = n (i >= 0, j >= 0).

Original entry on oeis.org

0, 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 9, 10, 11, 12, 12, 13, 14, 15, 15, 16, 17, 18, 18, 19, 20, 21, 21, 22, 23, 24, 25, 25, 26, 27, 28, 28, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36, 37, 38, 39, 39, 40, 41, 42, 42, 43, 44, 45, 46, 46, 47, 48, 49, 50, 50, 51, 52
Offset: 0

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Author

Sébastien Dumortier, Jan 15 2007

Keywords

Comments

For n = 2, there is not a unique maximum because 2^0 = 1^1; we choose j = 0. - T. D. Noe, Apr 08 2014

Examples

			If the sum is 5, the powers are: 0^5, 1^4, 2^3, 3^2, 4^1 and 5^0. The highest is 3^2 so a(5) = 2.
		

Crossrefs

Cf. A056155.

Programs

  • Mathematica
    Join[{0,0},Table[SortBy[{#[[1]],#[[2]],#[[1]]^#[[2]]}&/@Flatten[ Permutations /@ IntegerPartitions[n,{2}],1],Last][[-1,2]],{n,3,80}]] (* Harvey P. Dale, Sep 01 2013 *)
    Join[{0, 0, 0}, Flatten[Table[s = Table[(n - k)^k, {k, n}]; Position[s, Max[s]], {n, 3, 80}]]] (* T. D. Noe, Apr 08 2014 *)

Extensions

a(0) added by T. D. Noe, Apr 08 2014