23606

Appears in sequences

• First n digits after decimal point in the expansion of sqrt(n), or 0 if n is a square. Leading zeros omitted.at n=4A060563
• a(n) = n*(n+1)*(9*n^2 - n - 5)/6.at n=11A172075
• a(n) = (1/n) * Sum_{k=1..n} tau( (n/gcd(k,n))^n ).at n=41A373003
• Number of connected pairs of subsets of [n] with each being a different size.at n=8A377464