44545

Appears in sequences

• Numbers n such that h(n) = 3 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=32A078420
• Table read by antidiagonals: T(n,k) is the number of idempotent n X n 0..k matrices of rank 1.at n=49A224524
• Number of idempotent 5X5 0..n matrices of rank 1.at n=5A224527
• Cardinality of Image^inf({ 2 }) under repeated base-n zero-split doubling.at n=34A254638
• Numbers which have only digits 4 and 5 in base 10.at n=35A256290
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood.at n=41A270463