54560

Appears in sequences

• a(n) = floor(n(n-1)(n-2)(n-3)/18).at n=33A011928
• Smallest k such that n^8+k^8, n^4+k^4, n^2+k^2, n+k are simultaneously prime.at n=40A071564
• Sum of numbers under a triangle on a spiral staircase of width 10.at n=29A111080
• Number of length n+4 0..3 arrays with at most two downsteps in every 4 consecutive neighbor pairs.at n=3A255656
• T(n,k)=Number of length n+k 0..3 arrays with at most two downsteps in every k consecutive neighbor pairs.at n=24A255660
• Number of length n+4 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=3A255664
• Array read by antidiagonals: T(n,k) is the number of 3-connected triangulations of a disk up to orientation-preserving isomorphisms with n interior nodes and k nodes on the boundary, n >= 1, k >= 3.at n=42A341923
• Number of 3-connected triangulations of a pentagon up to orientation-preserving isomorphisms with n interior nodes.at n=6A341925
• a(n) is the number in the first column of the Trithoff (tribonacci) array that starts off the row containing the tail of n times the tribonacci sequence.at n=31A351689
• a(n) = Sum_{p <= n <= q < 2n, p,q prime} (p * q).at n=31A352777
• a(n) = Sum_{p <= n <= q < 2n, p,q prime} (p * q).at n=32A352777