90417

Appears in sequences

• Number of tilings of 4 X 3n rectangle by 1 X 3 rectangles. Rotations and reflections are considered distinct tilings.at n=8A049086
• Triangle formed by coefficients of the expansion of p(x,n) = (1+x-x^2)^(n+1)*Sum_{j >= 0} (2*j+1)^n*(-x + x^2)^j.at n=42A156918
• Number of binary strings of length n with no substrings equal to 0001 or 0011.at n=20A164393