OFFSET
1,1
COMMENTS
Numbers n such that n+1 and n can be written, respectively, in at least one and two ways as the sum of two positive cubes.
EXAMPLE
a(1) = 2514^3 + 1364^3 = 2498^3 + 1416^3, a(1)+1 = 2641^3 + 182^3.
a(2) = 2492^3 + 1734^3 = 2726^3 + 756^3, a(2)+1 = 2282^3 + 2065^3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov and Giovanni Resta, May 27 2016
STATUS
approved