198571

Properties

Appears in sequences

• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 1's than 2's.at n=18A022327
• Sum of lengths of initial and final horizontal segments over all dispersed Dyck paths of semilength n (i.e., over all Motzkin paths of length n with no (1,0)-steps at positive heights).at n=19A191531
• Prime numbersat n=17869