47849

Appears in sequences

• Number of anisohedral polyominoes with n cells.at n=21A075206
• Positive integers of the form (18*m^2+1)/11.at n=31A113338
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.at n=10A148805
• a(n) = a(n-1) + a(n-2) + a(n-3), with a(0) = 1, a(1) = a(2) = 8.at n=16A214830
• a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.at n=13A328175