3720995

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 1 for n > 1, a(0)=1, a(1)=5.at n=29A022319
• Number of lattice paths from (0,0) to (n,n) with steps (0,1), (1,0) and, when on the diagonal, (1,1).at n=11A026671
• a(n) = T(n, floor(n/2)), T given by A026670.at n=22A026676
• a(n) = T(n, floor(n/2)), T given by A026736.at n=23A026742
• a(n) = greatest number in row n of array T given by A026736.at n=23A027214
• a(n) = A014217(n+3) - A014217(n).at n=29A153263
• Expansion of 1/(1-x-x^3*c(x^3)), c(x) the g.f. of A000108.at n=34A165407
• Expansion of g.f. 5*(1-x-x^2)/((1+x)*(1-3*x+x^2)).at n=15A189316