66612

Appears in sequences

• Triangle T(n,k) read by rows of partially ordered sets ("posets") with n unlabeled nodes and k maximal elements (0 <= k <= n).at n=48A065066
• Positive numbers whose square starts and ends with exactly 44, and no 444.at n=22A348831
• a(n) is the index of the smallest n-gonal number with exactly n distinct prime factors.at n=6A358321
• Length of the long leg in the unique primitive Pythagorean triple whose inradius is A002378(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=13A384288