918155952

Appears in sequences

• Least positive integer k such that the fractional part of k*sqrt(5) has its n initial partial quotients all equal to 1.at n=21A004794
• a(n) = floor[(phi + n mod 2)*a(n-1)], a(1)=1.at n=30A107857
• a(n) = b(k), where b(k) = Fibonacci(n-1) and k = floor( n*(1+sqrt(5))/2 ).at n=30A107858
• Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.at n=22A113067
• Expansion of (1-3*x)/(1-5*x+3*x^2+x^3).at n=15A232970
• Indices of centered pentagonal numbers (A005891) that are also triangular numbers (A000217).at n=15A254627
• p-INVERT of the positive integers, where p(S) = 1 - S^2.at n=22A290890
• Upper (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=22A387779