52888

Appears in sequences

• a(n) = n*(n+1)*(n^2+5*n+18)/24.at n=31A051744
• a(n) = n*(n+1)*(n+7)*(122+57*n+n^2)/120.at n=14A101862
• Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 9.at n=6A116109
• Numbers k such that k concatenated with itself gives the product of two numbers which differ by 7.at n=7A116160
• Numbers k such that k concatenated with k+6 gives the product of two numbers which differ by 5.at n=3A116200
• a(n) = Sum_{k=0..n} binomial(4*n+k-1,k) * binomial(4*n+k,n-k).at n=4A379026