252548

Appears in sequences

• First occurrence of n consecutive numbers that take same number of steps to reach 1 in 3x+1 problem.at n=26A000546
• a(n) begins the first chain of n consecutive positive integers that have equal h-values, where h(k) is the length of the finite sequence k, f(k), f(f(k)), ...., 1 in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=25A078441
• a(n) begins the first chain of n consecutive positive integers that have equal h-values, where h(k) is the length of the finite sequence k, f(k), f(f(k)), ...., 1 in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=26A078441
• a(n) is the first number k such that the n Collatz runs starting at the consecutive numbers k, k+1, ..., k+n-1 all have the same prime-valued height while the runs starting at k-1 and k+n have nonprime heights.at n=26A339773
• Numbers that begin a record-length run of consecutive numbers having the same Collatz trajectory length.at n=11A351104