38785

Appears in sequences

• a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = (Lucas numbers).at n=17A024459
• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (Lucas numbers).at n=16A025079
• Numerator of fraction equal to the continued fraction [ 2, 3, 5, ...prime(n) ].at n=5A036247
• Composite numbers whose prime factors contain no digits other than 5 and 7.at n=38A036320
• Denominator of fraction equal to the continued fraction [p(n); p(n-1),...,5,3,2].at n=6A083659
• Number of terms of A072873 less than or equal to 10^n.at n=46A267757