25750

Appears in sequences

• Integer part of Gamma(n+3/10)/Gamma(3/10).at n=9A020062
• a(n) = A063997(n)/4.at n=32A088406
• Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n having k (1,1) steps starting at level zero (can be easily expressed also in RNA secondary structure terminology).at n=53A089736
• a(n) = (1/6)*(n+1)*(10*n^2 + 17*n + 12).at n=24A102296
• Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=24A207106
• G.f.: Sum_{n>=0} x^n * Sum_{k=0..n} binomial(n,k)^2 * x^k/(1-3*x)^k.at n=9A217665
• a(n)^2 is the start of the first occurrence of n consecutive perfect powers, all of which are squares with exponents equal to 2 (A111245).at n=44A340663