54126

Appears in sequences

• Structured truncated tetrahedral numbers.at n=30A100156
• Number of bifurcating nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).at n=38A293522
• Number of nX6 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.at n=10A301660
• First term of n-th difference sequence of (floor(Pi*k/4)), k >= 0.at n=18A325743
• a(n) = Sum_{k=0..n} (k/n)^2 * binomial(n,k)^5.at n=4A374614
• Number of subsets of 6 integers between 1 and n such that their sum is 1 modulo n.at n=29A381290