120330

Appears in sequences

• Sixth derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.at n=38A215836
• a(n) = largest k such that A049820(k) <= A262509(n).at n=12A263083