55290

Appears in sequences

• "BFK" (reversible, size, unlabeled) transform of 2,2,2,2...at n=22A032043
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,11.at n=23A064242
• Squarefree nonprimes n with a divisor d such that phi(n) divides n+d.at n=29A217741
• Least k starting a chain or (2n+1)-tuple of consecutive integers {h(k+i)}, i=0,1,...,2n (excluding the trivial chain when h(k) = h(k+1) = ... = h(k+2n)) with symmetrical gaps about the center, where h(k) is the length of the finite set {k, f(k), f(f(k)),...,1} in the Collatz (or 3x + 1) problem.at n=5A268468