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.

A369882 Decimal expansion of log(2) - 1/4.

Original entry on oeis.org

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

Views

Author

Claude H. R. Dequatre, Feb 04 2024

Keywords

Examples

			0.443147180559945309417232121458176568075500134...
		

Crossrefs

Essentially the same as A002162 and A187832.

Programs

  • Mathematica
    RealDigits[Log[2] - 1/4, 10, 120][[1]] (* Amiram Eldar, Feb 04 2024 *)
  • PARI
    log(2)-1/4

Formula

Equals Sum_{k >= 2} (-1)^k*k/(k^2 - 1) [Shamos].
Equals Sum_{k >= 1} (-1)^(k+1)*(k + 1)/(k*(k + 2)).