113631

Appears in sequences

• Composite numbers with four prime factors (not necessarily distinct) whose concatenation yields a palindrome.at n=26A046453
• a(n) = ceiling(x(n)), where x(n) = 3*x(n-1)/2 and x(1) = 1.at n=27A117590
• a(n) = (7*n^4 + 5*n^2)/12.at n=20A185505
• Numbers k such that (2*10^k + 529)/9 is prime.at n=28A281734