OFFSET
1,2
LINKS
Colin Barker, Table of n, a(n) for n = 1..200
FORMULA
Conjecture: a(4n) = 0. - Michel Marcus, Nov 09 2014
MATHEMATICA
g[n_] := Sum[(a + b I)^n, {a, 1, n}, {b, 1, n}]; Table[Im[g[n]], {n, 33}]
PROG
(PARI) vector(100, n, imag(sum(x=1, n, sum(y=1, n, (x+I*y)^n)))) \\ Colin Barker, Nov 09 2014
CROSSREFS
KEYWORD
sign
AUTHOR
José María Grau Ribas, Nov 30 2013
STATUS
approved