101970

Appears in sequences

• Expansion of (1-x)/(1-3x-4x^2+4x^3).at n=9A052965
• (Sum of digits of n)^5 - (sum of digits^5 of n).at n=29A069965
• a(n) = (n+1)(n+2)^2*(n+3)^2*(n+4)(5n^2 + 21n + 20)/2880.at n=7A107956
• Psibonacci numbers: solutions n of the equation psi(n) = psi(n-1) + psi(n-2), where psi is the Dedekind psi function (A001615).at n=4A291126
• Number of maximal irredundant and minimal dominating sets in the n X n rook complement graph.at n=8A291623
• Take apart the sides of each of the integer-sided triangles with perimeter n (at their vertices) and rearrange them orthogonally in 3-space so that their endpoints coincide at a single point. a(n) is the total volume of all rectangular prisms enclosed in this way.at n=42A308233