38765

Appears in sequences

• a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = (1, p(1), p(2), ...).at n=35A025099
• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 19.at n=24A051984
• Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(x) = f(f(g(x))).at n=5A239760
• Number of (n+1)X(2+1) 0..4 arrays with each row and column divisible by 7, read as a base-5 number with top and left being the most significant digits.at n=3A263552
• Number of (n+1)X(4+1) 0..4 arrays with each row and column divisible by 7, read as a base-5 number with top and left being the most significant digits.at n=1A263554
• T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 7, read as a base-5 number with top and left being the most significant digits.at n=11A263558
• T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 7, read as a base-5 number with top and left being the most significant digits.at n=13A263558
• Expansion of Product_{k>=1} 1/(1 - k^2*x^(k^2)).at n=29A282209