76856

Appears in sequences

• a(n) is the least integer greater than a(n-1) such that a(n-1)*2^a(n) - 1 is prime, a(1) = 1.at n=23A046809
• Number of length n+3 0..6 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=2A249288
• T(n,k) = Number of length n+3 0..k arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=30A249290
• Number of length 3+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=5A249293
• Numbers that are partial sums of the reverses of the sequence of primes and are reverses of primes.at n=16A381245
• a(n) is the number of positive integer solutions of n*x*y*z*v*w = (x + n) * (y + n) * (z + n) * (v + n) * (w + n), x <= y <= z <= v <= w.at n=15A381644