A182369 Decimal expansion of (7^(e - 1/e) - 9)*Pi^2, also known as Jenny's constant.

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

Offset

3,1

Comments

First few digits reproduce the digits of the phone number in the song "867-5309/Jenny" performed by Tommy Tutone (see A104175).

The next digit is a 0, and the following 4 digits (1, 9, 8, 1) are the year the song was recorded (1981). (Noticed by Rob Johnson of the explainxkcd.com forums)

Links

Ivan Panchenko, Table of n, a(n) for n = 3..1000

explain xkcd, 1047: Approximations.

Robert Munafo, 867.5309019816854...

Randall Munroe, xkcd: A Table of Slightly Wrong Equations and Identities Useful for Approximations and/or Trolling Teachers

Eric Weisstein's World of Mathematics, Jenny's Constant

Wikipedia, 867-5309/Jenny

Formula

(7^(e - 1/e) - 9)*Pi^2.

Example

867.530901981685409755827522496143183844029723...

Mathematica

RealDigits[(7^(E-1/E)-9)Pi^2, 10, 120][[1]] (* Harvey P. Dale, Dec 31 2018 *)

Crossrefs

Cf. A000796, A001113, A104175.

Sequence in context: A004497 A091899 A292829 * A104175 A019792 A272487

Adjacent sequences: A182366 A182367 A182368 * A182370 A182371 A182372

Keyword

nonn,cons

Author

Eric W. Weisstein, Apr 26 2012

Extensions

Title edited by Matthew Vandermast, May 05 2012

Status

approved