267691domain: NAppears in sequencesQuasi-Carmichael numbers to base -5: squarefree composites n such that prime p|n ==> p+5|n+5.at n=30A029565Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, -1), (1, -1, 0), (1, 1, 1)}.at n=10A149587