OFFSET
2,3
COMMENTS
1/S(4) + 1/S(5) + ... + 1/S(inf) ~ e^(1/2) - 1
LINKS
Ofer Barasofsky, On the geometry of natural numbers
FORMULA
S(n) = S(0,n) + S(1,n) + ... + S(n-1,n) where S(i,n) is the area of the polygon constructed from connecting with a straight line all the members with value i.
EXAMPLE
Example: n=4 1 2 3 2 0 2 3 2 1 S(0,4) = 0 S(1,4) = 0 S(2,4) = 2 S(3,4) = 0 S(4) = 0 + 0 + 2 + 0 = 2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ofer Barasofsky (oferbarasofsky(AT)gmail.com), Feb 21 2009
STATUS
approved