21707

Appears in sequences

• 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, 0, 0), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.at n=8A149700
• Number of nondecreasing sequences of 4 1..n integers with no element dividing the sequence sum.at n=28A212871
• Positions of 3's in A234323.at n=62A234804
• Number of (n+1)X(2+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.at n=5A235407
• Number of (n+1)X(6+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.at n=1A235411
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.at n=22A235413
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.at n=26A235413
• Number of strictly increasing sequences of n integers 0 < u_1 < ... < u_n such that 1/u_1 + 1/(u_1 + u_2) + ... + 1/(u_1 + ... + u_n) = n/(n+1).at n=6A340772
• Numbers that are the sum of four third powers in six or more ways.at n=32A345148
• Numbers that are the sum of four third powers in exactly six ways.at n=27A345149