23828

Appears in sequences

• Smallest multiple of n beginning with n and having a digit sum n, or 0 if no such number exists.at n=22A077727
• Convolution of the prime numbers with phi(n).at n=39A086734
• Triangle read by rows: T(n,k) = (n+1-k)*|s(n,n+1-k)| - 2*|s(n-1,n-k)|, where s(n,k) are the signed Stirling numbers of the first kind and 1 <= k <= n.at n=32A199221
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w=R, x=R, y=R, z<R, where R = max{w,x,y,z} - min{w,x,y,z}.at n=13A212751
• Number of partitions of n such that m(greatest part) >= m(1), where m = multiplicity.at n=44A240080
• Numbers k such that 3*10^k + 37 is prime.at n=22A294122
• a(n) = Sum_{i|n, j|n, k|n} i*j*k/gcd(i,j,k).at n=32A344133
• Numbers that are the sum of eight fourth powers in exactly nine ways.at n=30A345841