2178293

Appears in sequences

• Third column of triangle A054450 (partial row sums of unsigned Chebyshev triangle A049310).at n=29A054451
• Partial sums of A027941(n-1) with a(-1) = 0.at n=16A054452
• a(n) = Sum_{k=0..floor(n/2)} binomial(n-k+3, k).at n=28A099571
• a(n) = F(4n) - 2n, where F(n) = Fibonacci numbers A000045.at n=7A099922
• Antidiagonal sums of triangular array T defined in A014430: T(j,k) = binomial(j+1, k) - 1 for 1 <= k <= j.at n=28A129696
• Convolution of (1,-1,2,-2,3,-3,...) and A000045 (Fibonacci numbers).at n=31A213043
• a(0) = a(1) = 1; for n>1, a(n) = a(n-1) + a(n-2) + floor(n/2).at n=29A215004