68524

Appears in sequences

• Integers n >= 1 such that n divides 0!-1!+2!-3!+4!-...+(-1)^{n-1}(n-1)!.at n=37A064383
• Integers k such that 5*10^k + 51 is prime.at n=13A110983
• Collatz (or 3x+1) trajectory starting at 703.at n=27A161021
• Multiples of 1852.at n=37A303272
• Records in the trajectory of all positive integers in the 3x+1 or Collatz problem, including the trajectory [1, 4, 2, 1] of 1.at n=29A347652
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] 1 / (exp(x) + exp(y) - exp(x+y))^4.at n=48A382736
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] 1 / (exp(x) + exp(y) - exp(x+y))^4.at n=51A382736