OFFSET
1,1
EXAMPLE
3^3 - 5^2 = 2, 3 + 3 + 5 + 2 = 13; 2^7 - 5^3 = 3, 2 + 7 + 5 + 3 = 17; 2^5 - 3^3 = 5, 2 + 5 + 3 + 3 = 13; 3^3 - 2^3 = 19, 3 + 3 + 2 + 3 = 11;
CROSSREFS
KEYWORD
nonn
AUTHOR
Oleg Zyakun, Aug 12 2009
STATUS
approved