0,3

a(n)=5^n-3^n-2^n.

a(4)=528 because 5^4=625, 3^4=81, 2^4=16 and we can write 625-81-16=528.

Cf. A000079, A000244, A000351, A001047.

Sequence in context: A121590 A005758 A084485 this_sequence A130072 A073382 A036216

Adjacent sequences: A135155 A135156 A135157 this_sequence A135159 A135160 A135161

easy,sign

Omar E. Pol (info(AT)polprimos.com), Nov 21 2007