249523

Appears in sequences

• Dimensions of graded algebra associated with meanders (subalgebra version).at n=12A060089
• a(n) = number of n-lettered words in the alphabet {1, 2, 3} with as many occurrences of the substring (consecutive subword) [1, 1, 2] as of [1, 1, 3].at n=12A211288