22619536

Appears in sequences

• Numbers k such that 2*k*(k+2) is a square.at n=10A082639
• a(2n) = A002315(n), a(2n+1) = A082639(n+1).at n=19A113224
• Number of dominating subsets with k vertices in all the graphs G(n) (n>=1) obtained by taking n copies of the path P_3 and identifying one of their endpoints (a star with n branches of length 2).at n=18A213667
• Number of 2 X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or nw-se.at n=19A228797
• Row sums of triangle in A152719.at n=37A238375
• Expansion of (x^4+x^3-x^2+x)/(x^3+x^2-3*x+1).at n=20A265278
• Expansion of 2*x^2 / (x^3 + x^2 - 3x + 1).at n=20A293004