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A102771 Decimal expansion of area of a pentagon with each edge unit length. 4
1, 7, 2, 0, 4, 7, 7, 4, 0, 0, 5, 8, 8, 9, 6, 6, 9, 2, 2, 7, 5, 9, 0, 1, 1, 9, 7, 7, 3, 8, 8, 6, 0, 9, 5, 9, 9, 4, 0, 7, 3, 7, 4, 1, 7, 0, 0, 1, 0, 1, 9, 8, 3, 2, 9, 2, 0, 7, 0, 9, 4, 7, 0, 7, 0, 2, 3, 8, 6, 8, 9, 9, 2, 2, 0, 8, 9, 6, 6, 2, 3, 1, 3, 3, 2, 4, 4, 1, 2, 4, 1, 3, 8, 7, 5, 8, 7, 7, 4 (list; constant; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Eric Weisstein's World of Mathematics, Pentagon

FORMULA

sqrt(25 + 10*sqrt(5)) / 4

EXAMPLE

1.720477400588966922759011977...

CROSSREFS

Sequence in context: A027496 A056009 A159252 * A093954 A177703 A200338

Adjacent sequences:  A102768 A102769 A102770 * A102772 A102773 A102774

KEYWORD

nonn,cons

AUTHOR

Bryan Jacobs (bryanjj(AT)gmail.com), Feb 10 2005

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Last modified February 16 10:32 EST 2012. Contains 205904 sequences.