42400

Appears in sequences

• n written in fractional base 6/4.at n=36A024637
• Theta series of odd 8-dimensional 5-modular lattice O(5).at n=41A029719
• Sum_{k=2..n} min(k,n-k)*phi(k)*(n-k).at n=34A092274
• Number of length n+5 0..3 arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=2A249525
• T(n,k)=Number of length n+5 0..k arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=12A249530
• Number of length 3+5 0..n arrays with no six consecutive terms having five times any element equal to the sum of the remaining five.at n=2A249533
• Number of ordered pairs of involutions on [n] that commute.at n=8A362819
• Array read by antidiagonals: T(n,k) is the number of k-tuples of involutions on [n] that pairwise commute.at n=63A362824