A358989 Decimal expansion of 13*sqrt(146)/50.

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

Offset

1,1

Comments

An approximation for Pi by C. G. Specht and Helen A. Merrill.

References

Helen A. Merrill, Mathematical Excursions, Boston, Bruce Humphries, Inc., 1933.

Links

Table of n, a(n) for n=1..94.

Herman C. Schepler, The Chronology of PI, Mathematics Magazine, Vol. 23, No. 5 (May - Jun., 1950), pp. 279-283.

C. G. Specht, Annäherungs-Construction des Kreis-Umfangs und Flächen-Inhalts, Journal für die reine und angewandte Mathematik, Vol. 3 (1828), p. 83.

Example

3.1415919531345887377535382093700424815595822543413056179176564284220845325277...

Mathematica

RealDigits[13*Sqrt[146]/50, 10, 120][[1]] (* Amiram Eldar, Dec 09 2022 *)

Crossrefs

Cf. A000796 (Pi).

Sequence in context: A379324 A152040 A013705 * A216548 A087478 A328927

Adjacent sequences: A358986 A358987 A358988 * A358990 A358991 A358992

Keyword

nonn,cons

Author

Jack Zhang, Dec 09 2022

Status

approved