A020789 - OEIS

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A020789

Decimal expansion of 1/sqrt(32).

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

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OFFSET

0,2

COMMENTS

Equals 0.176777... = 5*sqrt(2)/40, which is a tenth of sum_{n = 1 .. infinity} n^2*binomial(2n, n)/8^n [D. H. Lehmer, Am. Math. Monthly 92 (1985) 449]. - R. J. Mathar, Mar 04 2009

LINKS

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

Albert Einstein, Quantum theory of monatomic ideal gases (coefficient appears as 0.1768 in the first formula)

Index entries for algebraic numbers, degree 2

EXAMPLE

0.176776695296636881100211090526212259821208984422118509147...

MATHEMATICA

RealDigits[N[1/Sqrt[32], 200]] (* Vladimir Joseph Stephan Orlovsky, May 30 2010 *)

CROSSREFS

Sequence in context: A188943 A093349 A309641 * A153857 A093813 A092902

Adjacent sequences: A020786 A020787 A020788 * A020790 A020791 A020792

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved