The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A334402

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A334402

Decimal expansion of cosh(Pi).
(history; published version)

#10 by Susanna Cuyler at Mon Aug 10 00:23:33 EDT 2020

STATUS

proposed

approved

#9 by Amiram Eldar at Sun Aug 09 02:19:38 EDT 2020

STATUS

editing

proposed

#8 by Amiram Eldar at Sun Aug 09 02:11:06 EDT 2020

FORMULA

Equals Product_{k>=1} (k^2 + 4)/(k^2 + 1). - Amiram Eldar, Aug 09 2020

CROSSREFS

Cf. A000796, A001113, A039661, A068470, A073743, A093580, A175314, A308715, A323982, A334401.

STATUS

approved

editing

#7 by Vaclav Kotesovec at Mon Apr 27 02:02:12 EDT 2020

STATUS

reviewed

approved

#6 by Wesley Ivan Hurt at Mon Apr 27 00:54:52 EDT 2020

STATUS

proposed

reviewed

#5 by Ilya Gutkovskiy at Mon Apr 27 00:43:10 EDT 2020

STATUS

editing

proposed

#4 by Ilya Gutkovskiy at Mon Apr 27 00:37:28 EDT 2020

CROSSREFS

Cf. A000796, A001113, A039661, A068470, A093580, A073743, A093580, A308715, A323982, A334401.

#3 by Ilya Gutkovskiy at Mon Apr 27 00:04:09 EDT 2020

FORMULA

Equals Product_{k>=0} (1 + 4/(2*k+1)^2).

#2 by Ilya Gutkovskiy at Sun Apr 26 23:25:04 EDT 2020

NAME

allocated for Ilya GutkovskiyDecimal expansion of cosh(Pi).

DATA

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

OFFSET

2,3

COMMENTS

This constant is transcendental.

LINKS

<a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>

FORMULA

Equals Sum_{k>=0} Pi^(2*k)/(2*k)!.

EXAMPLE

(e^Pi + e^(-Pi))/2 = 11.5919532755215206277517520525601...

MATHEMATICA

RealDigits[Cosh[Pi], 10, 110] [[1]]

CROSSREFS

Cf. A000796, A001113, A039661, A068470, A093580, A073743, A308715, A323982, A334401.

KEYWORD

allocated

nonn,cons

AUTHOR

Ilya Gutkovskiy, Apr 26 2020

STATUS

approved

editing

#1 by Ilya Gutkovskiy at Sun Apr 26 23:25:04 EDT 2020

NAME

allocated for Ilya Gutkovskiy

KEYWORD

allocated

STATUS

approved