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.

A265301 Decimal expansion of Sum_{k>=1} c(2k), where c = convergents to (x = sqrt(6)).

Original entry on oeis.org

5, 1, 0, 2, 5, 7, 7, 4, 8, 2, 8, 4, 4, 7, 5, 3, 6, 6, 8, 7, 0, 9, 7, 4, 1, 8, 6, 1, 6, 4, 1, 0, 1, 0, 5, 9, 5, 6, 1, 6, 0, 0, 2, 0, 2, 9, 8, 4, 0, 3, 7, 1, 6, 6, 0, 9, 9, 6, 8, 0, 9, 4, 1, 3, 0, 5, 2, 4, 6, 3, 3, 9, 0, 6, 3, 0, 8, 4, 9, 6, 2, 8, 1, 7, 3, 5
Offset: 0

Views

Author

Clark Kimberling, Dec 13 2015

Keywords

Examples

			sum = 0.0510257748284475366870974186164101059561600202984037166...
		

Crossrefs

Cf. A010464, A265300, A265302, A265288 (guide).

Programs

  • Mathematica
    x = Sqrt[6]; z = 600; c = Convergents[x, z];
    s1 = Sum[x - c[[2 k - 1]], {k, 1, z/2}]; N[s1, 200]
    s2 = Sum[c[[2 k]] - x, {k, 1, z/2}]; N[s2, 200]
    N[s1 + s2, 200]
    RealDigits[s1, 10, 120][[1]]  (* A265300 *)
    RealDigits[s2, 10, 120][[1]]  (* A265301 *)
    RealDigits[s1 + s2, 10, 120][[1]](* A265302 *)