55686

Appears in sequences

• Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x.at n=6A048132
• Integers k such that k*28*c + 1 is prime for c = 1, 2, 4, 7 and 14.at n=20A067199
• Table T(n,k) by antidiagonals. T(n,k) is the number of primitive (=aperiodic) k-ary words with length less than or equal to n (n,k >= 1).at n=60A143326
• Number of 4-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.at n=32A187299
• Numbers k such that k and k+1 have the same binary XOR of divisors.at n=38A227443
• Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 1 and no column sum 1.at n=22A257440
• Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.at n=8A259738