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A227514 Decimal expansion of the square root of 2/e. 0
8, 5, 7, 7, 6, 3, 8, 8, 4, 9, 6, 0, 7, 0, 6, 7, 9, 6, 4, 8, 0, 1, 8, 9, 6, 4, 1, 2, 7, 8, 7, 7, 2, 4, 7, 8, 1, 2, 0, 7, 9, 8, 6, 0, 7, 7, 5, 2, 5, 7, 0, 2, 9, 3, 9, 9, 9, 7, 4, 1, 9, 4, 8, 1, 1, 7, 9, 4, 9, 9, 8, 4, 0, 1, 8, 3, 0, 0, 2, 1, 6, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

This appears for example while integrating the product of the absolute value of H_2(x) exp(-x^2) over the real line, where H_2 is the second Hermite polynomial.

LINKS

Table of n, a(n) for n=0..81.

R. J. Mathar, Orthogonal linear combinations of Gaussian Type Orbitals, arXiv:physics/9907051, Section VII.

FORMULA

Square root of A135002 and also the ratio A002193 / A019774 .

EXAMPLE

0.85776388496070679648018...

MAPLE

evalf(sqrt(2/exp(1))) ;

PROG

(PARI) sqrt(2/exp(1)) \\ Charles R Greathouse IV, Apr 16 2014

CROSSREFS

Sequence in context: A085663 A265303 A021925 * A305036 A119812 A153799

Adjacent sequences:  A227511 A227512 A227513 * A227515 A227516 A227517

KEYWORD

cons,nonn,easy

AUTHOR

R. J. Mathar, Jul 14 2013

STATUS

approved

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Last modified September 28 17:33 EDT 2021. Contains 347716 sequences. (Running on oeis4.)