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A157295 Decimal expansion of 630/Pi^6. 0
6, 5, 5, 3, 0, 1, 7, 2, 8, 1, 7, 6, 3, 8, 6, 9, 4, 6, 5, 3, 6, 5, 9, 7, 7, 0, 9, 9, 9, 5, 9, 4, 9, 4, 2, 1, 9, 6, 7, 4, 8, 1, 0, 1, 0, 6, 5, 7, 7, 3, 7, 8, 8, 7, 2, 2, 9, 1, 6, 0, 2, 6, 9, 9, 5, 7, 0, 0, 1, 6, 9, 4, 2, 2, 9, 7, 9, 1, 6, 1, 6, 5, 3, 9, 3, 2, 6, 3, 6, 9, 8, 5, 2, 1, 9, 6, 9, 4, 7, 7, 0, 2, 7, 6, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

The product_{p= primes = A000040} (1-1/p^2+1/p^4-1/p^6).

LINKS

Table of n, a(n) for n=0..104.

FORMULA

Equals A013662/(A013661*A013666) = product_{i>=1} (1-1/A001248(i)+1/A030514(i)-1/A030516(i)) = 630*A092746.

EXAMPLE

0.655301728176386946536... = (1-1/2^2+1/2^4-1/2^6)*(1-1/3^2+1/3^4-1/3^6)*(1-1/5^2+1/5^4-1/5^6)*(1-1/7^2+1/7^4-1/7^6)*...

MAPLE

evalf(630/Pi^6) ;

CROSSREFS

Sequence in context: A021862 A199375 A244808 * A011485 A084339 A050815

Adjacent sequences:  A157292 A157293 A157294 * A157296 A157297 A157298

KEYWORD

cons,easy,nonn

AUTHOR

R. J. Mathar, Feb 26 2009

STATUS

approved

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Last modified April 6 05:38 EDT 2020. Contains 333267 sequences. (Running on oeis4.)