27021

Appears in sequences

• Partial sums of A011863.at n=17A011888
• 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, -1, 1), (-1, 1, 0), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.at n=10A148253
• 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, -1, 0), (-1, 0, -1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.at n=8A150361
• a(n) = (4*n^3 - 9*n^2 + 11*n + 3)/3.at n=28A161707
• Odd numbers k such that phi(k) and cototient(k) have the same prime signature.at n=38A280927
• Number of compositions of n where the difference between largest and smallest parts equals four.at n=14A323121