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A126561 Decimal expansion of (Pi^2-9)/12. 0
7, 2, 4, 6, 7, 0, 3, 3, 4, 2, 4, 1, 1, 3, 2, 1, 8, 2, 3, 6, 2, 0, 7, 5, 8, 3, 3, 2, 3, 0, 1, 2, 5, 9, 4, 6, 0, 9, 4, 7, 4, 9, 5, 0, 6, 0, 3, 3, 9, 9, 2, 1, 8, 8, 6, 7, 7, 7, 9, 1, 1, 4, 6, 8, 5, 0, 0, 3, 7, 3, 5, 2, 0, 1, 6, 0, 0, 4, 3, 6, 9, 1, 6, 8, 1, 4, 4, 5, 0, 3, 0, 9, 8, 7, 9, 3, 5, 2, 6, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

-1,1

COMMENTS

Sum of infinite series = Sum[1/i/(i+1)/(i+2)^2,{i,1,Infinity}]=(Pi^2-9)/12. For n>1, a(n)=A072691(n+1).

LINKS

Table of n, a(n) for n=-1..98.

EXAMPLE

0.072467033424113218236207583323...

CROSSREFS

Cf. A072691.

Sequence in context: A154174 A257452 A021142 * A246508 A144875 A248286

Adjacent sequences:  A126558 A126559 A126560 * A126562 A126563 A126564

KEYWORD

nonn,easy,cons

AUTHOR

Zak Seidov, Mar 12 2007

STATUS

approved

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Last modified June 27 11:25 EDT 2017. Contains 288788 sequences.