170982

Appears in sequences

• a(n) =(A001359[n]^2-1)/2.at n=32A117849
• Intersection of A002378 and A135013.at n=7A135014
• 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, 0), (0, -1, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.at n=9A150559
• a(n) = smallest number k such that three consecutive prime numbers prime(n), prime(n+1) and prime(n+2) are divisors of k, k+1 and k+2 respectively.at n=16A180095
• Harary index of the n X n queen graph.at n=27A296196
• Number of 3 X 3 matrices with unit determinant and nonnegative integer entries whose sum is n.at n=32A361083