129236

Appears in sequences

• Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x.at n=31A048132
• As a vector, shifts to the left when multiplied by A054521.at n=40A147524
• Number of n X 3 nonnegative integer arrays with upper left 0 and every value within 3 of its city block distance from the upper left and every value increasing by 0 or 1 with every step right or down.at n=9A252823