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A179553
Decimal expansion of the surface area of pentagonal pyramid with edge length 1.
11
3, 8, 8, 5, 5, 4, 0, 9, 1, 0, 0, 5, 0, 0, 6, 3, 5, 3, 9, 6, 6, 8, 3, 1, 9, 9, 0, 4, 2, 7, 0, 9, 5, 0, 0, 5, 8, 0, 8, 5, 8, 8, 0, 7, 3, 7, 2, 7, 3, 1, 7, 4, 1, 1, 4, 2, 7, 6, 8, 5, 3, 4, 3, 1, 3, 3, 8, 7, 8, 5, 2, 6, 3, 3, 4, 4, 9, 6, 6, 2, 7, 7, 6, 8, 3, 8, 7, 3, 9, 7, 4, 8, 3, 4, 1, 4, 8, 4, 6, 0, 0, 8, 8, 4, 0
OFFSET
1,1
COMMENTS
Pentagonal pyramid: 6 faces, 6 vertices, and 10 edges.
FORMULA
Digits of sqrt(5/2*(10+sqrt(5)+sqrt(75+30sqrt(5))))/2.
EXAMPLE
3.885540910050063539668319904270950058085880737273174114276853431338785...
MATHEMATICA
RealDigits[N[Sqrt[5/2*(10+Sqrt[5]+Sqrt[75+30*Sqrt[5]])]/2, 200]]
KEYWORD
nonn,cons,easy
AUTHOR
STATUS
approved