A188278 - OEIS

%I #7 Mar 31 2012 12:36:11

%S 3,6,10,15,21,30,38,47,59,70,82,99,113,128,144,163,181,204,226,249,

%T 271,294,318,347,375,402,434,465,497,530,562,597,631,670,706,749,787,

%U 828,870,915,961,1006,1050,1097,1145,1196,1244,1299,1349,1402,1456,1509,1567

%N Number of nondecreasing strings of numbers x(i=1..4) in -n..n with sum x(i)^3 equal to 0

%C Row 4 of A188277

%H R. H. Hardin, <a href="/A188278/b188278.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=8

%e .-5...-8...-5...-8...-4...-5...-5...-5...-8...-6...-7...-2...-8...-3...-4...-6

%e .-4...-6...-1...-7...-3...-3...-5....0...-2...-4...-5....0...-4....0...-1...-2

%e .-3....6....1....7....3....3....5....0....2....4....5....0....4....0....1....2

%e ..6....8....5....8....4....5....5....5....8....6....7....2....8....3....4....6

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 26 2011