30734

Appears in sequences

• Numbers n such that 117*2^n-1 is prime.at n=45A050584
• Numbers k such that k | 11^k + 10^k + 9^k + 8^k + 7^k + 6^k + 5^k + 4^k + 3^k + 2^k + 1^k.at n=43A057292
• Number of steps to reach 1 in '3x+1' (or Collatz) problem starting with the n-th Mersenne prime.at n=16A181777
• Numbers m with C(2*m, m) + prime(m) prime, where C(2*m, m) = (2*m)!/(m!)^2.at n=51A236242
• Number of n X 3 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=22A240757
• Coefficient of x^n in the expansion of ( (1+x)^2 + x^3 )^n.at n=8A370285