33238

Appears in sequences

• Becomes prime or 4 after exactly 9 iterations of f(x) = sum of prime factors of x.at n=31A048131
• Semiprimes in A103373.at n=20A103393
• Semiprimes in A103376.at n=23A103396
• Number of nXn 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A317856
• Number of nX7 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A317862