OFFSET
1,1
FORMULA
EXAMPLE
a(4)= 89 because 89= 9^2+2^3= 81 + 8 and A130475(4)= 73 =abs(9^2-2^3)= abs(81-8) ; A130475(4) < a(4) ; A130475(4) and a(4) are prime numbers, members of A000040.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Tomas Xordan, May 28 2007
STATUS
approved