57685

Appears in sequences

• 3-almost prime octagonal numbers.at n=29A129927
• 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, 0), (0, 0, -1), (1, -1, -1), (1, 1, 1)}.at n=9A149583
• Number of -n..n circular arrays x(0..5) of 6 elements with zero sums of x(i) and x(i)*x((i+1) mod 6).at n=14A202008
• G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k) * (1/(1-x)^k - 1)^k.at n=10A245465
• Octagonal numbers with prime indices.at n=33A267144
• Octagonal numbers that are the product of three distinct primes.at n=24A382231