23639044

Appears in sequences

• Squares of Catalan numbers.at n=9A001246
• a(n) = C(floor(n/2 + 1/2))*C(floor(n/2 + 1)) where C(i) = Catalan numbers A000108.at n=17A005817
• Duplicate of A001246.at n=9A151342
• a(n) is the end of the first occurrence of n consecutive perfect powers, all of which are squares with exponents equal to 2 (A111245).at n=25A340662