51167078

Appears in sequences

• a(n) = C(n-1,1) + C(n-3,3) + ... + C(n-2*m-1,2*m+1), where m = floor((n-2)/4).at n=37A024490
• A Fibonacci convolution.at n=39A094686
• a(n) = floor[(phi + n mod 2)*a(n-1)], a(1)=1.at n=26A107857
• a(n) = b(k), where b(k) = Fibonacci(n-1) and k = floor( n*(1+sqrt(5))/2 ).at n=26A107858
• Upper limit palindromic complexity sequence involving Fibonacci numbers.at n=30A129730
• a(n) = ceiling(Fibonacci(n)/2).at n=40A173173
• a(n) = (A000045(n)+A173432(n))/2.at n=39A173433
• Expansion of (1-3*x)/(1-5*x+3*x^2+x^3).at n=13A232970
• Indices of centered pentagonal numbers (A005891) that are also triangular numbers (A000217).at n=13A254627
• a(n) is the integer k that minimizes |k/Fibonacci(n) - 1/2|.at n=40A293505
• Expansion of 1/( (1 + x) * (1 - x^2*(1 + x)^2) ).at n=40A375372
• Upper (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=19A387779