4976784

Appears in sequences

• a(n) = 7*a(n-1) - a(n-2) with a(0) = 0, a(1) = 1.at n=9A004187
• a(n) = floor(Fibonacci(n)/3).at n=36A004696
• a(n) = F(8*n+4)/3, where F=A000045 (the Fibonacci sequence).at n=4A049678
• Number of integers in {1, 2, ..., Fibonacci(n)} that are coprime to n.at n=35A074934
• A Fibonacci convolution.at n=17A099483
• A Fibonacci convolution.at n=17A099484
• a(n) = Product_{k=1..(n-1)/2} (5 + 4*cos(k*Pi/n)^2).at n=18A152119
• Numerator of x(n) = x(n-1) + x(n-2), x(0)=0, x(1)=1/3; denominator=A167817.at n=36A167816
• a(n) = ceiling(Fibonacci(n)/3).at n=36A293543
• a(n) = round(Fibonacci(n)/3).at n=36A293544
• Rectangular array R read by descending antidiagonals: divide the multiples of 3 in the Wythoff array (A035513) by 3, and delete all others.at n=36A328697
• T(n,k) are the values of a variant of the Chebyshev polynomials P(n,x) of order n evaluated at x = k, where T(n,k), n >= 0, k <= n is a triangle read by rows. P(0,x) = 1, P(1,x) = x, P(n,x) = x*P(n-1,x) - P(n-2,x).at n=43A357892
• Lower (1/3)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=17A387782
• Upper (1/3)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=17A387783