A019708 Decimal expansion of sqrt(Pi)/6.

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

Offset

0,1

Links

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Index entries for transcendental numbers.

Formula

Equals Integral_{x>=0} exp(-x^2)*erfc(x)^2 dx, where erfc is the complementary error function. - Jean-François Alcover, Jul 23 2013

Equals Sum_{k>=0} (k+1/2)!/(k+3)!. - Amiram Eldar, Jun 19 2023

Example

0.29540897515091933788302791389019086379959157602039785470230129830881854743...

Mathematica

RealDigits[Sqrt[Pi]/6, 10, 120][[1]] (* Harvey P. Dale, Mar 27 2020 *)

Prog

(PARI) sqrt(Pi)/6 \\ Charles R Greathouse IV, Oct 01 2022

Crossrefs

Cf. A002161.

Sequence in context: A248364 A021776 A241995 * A201397 A077124 A051491

Adjacent sequences: A019705 A019706 A019707 * A019709 A019710 A019711

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved