54610

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 = (odd natural numbers).at n=29A024463
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (odd natural numbers).at n=28A025083
• Expansion of (1+x)*(1+4*x)/((1-x)*(1-4*x)).at n=7A086462
• Numbers k for which A003973(k) is equal to 2*sigma(k).at n=21A337384