53815

Appears in sequences

• Quasi-Carmichael numbers to base -5: squarefree composites n such that prime p|n ==> p+5|n+5.at n=14A029565
• 10000n+1, 10000n+3, 10000n+7, 10000n+9 are all primes.at n=24A064963
• a(n) = (6*n+1)*(6*n+7).at n=38A085026
• a(n) = 56*n^2 - 1.at n=30A158658
• Number of (w,x,y) with all terms in {0,...,n} and |w-x|+|x-y|+|y-w| != w+x+y.at n=37A213485