142939

Properties

Appears in sequences

• Number of circular sequences of distinct positive integers between 1 and n such that the sum of any two consecutive elements is at least n+1.at n=12A108693
• 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), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.at n=9A149747
• a(n) = Sum_{k=0..floor(n/3)} binomial(k+2,2) * binomial(k,n-3*k)^2.at n=27A377147
• Prime numbersat n=13259