1664081

Appears in sequences

• a(n) = a(n-1) + a(n-2) - 1.at n=30A001588
• a(n+2) = a(n+1) + a(n) + (-1)^n, with a(1) = a(2) = 1.at n=31A066983
• A Chebyshev transform of (1+3x)/(1-3x).at n=14A099858
• Expansion of (1 - x + 3*x^2 + 4*x^4 + 8*x^5 + 3*x^6 + x^7 + x^8) / ((1 + x)*(1 - x + x^2)*(1 - x - x^2)*(1 + x + 2*x^2 - x^3 + x^4)).at n=29A108391
• Expansion of (1 - x + 3*x^2 + 4*x^4 + 8*x^5 + 3*x^6 + x^7 + x^8) / ((1 + x)*(1 - x + x^2)*(1 - x - x^2)*(1 + x + 2*x^2 - x^3 + x^4)).at n=30A108391
• a(n) = 2*(A000045(n)-(n mod 2)) + 1 + (n mod 2).at n=30A166012
• Constant term in the reduction by (x^2 -> x + 1) of the polynomial p(n,x) defined below at Comments.at n=16A192908
• a(n) = A255978(n) + 1.at n=30A377368