20294

Appears in sequences

• Number of 3-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.at n=36A187298
• a(n) = 24*A274300(n) + 14.at n=10A274301
• O.g.f. A(x) satisfies: [x^n] exp(n*A(x)) * (1 - n*x/(1-x)) = 0, for n > 0.at n=6A321087
• Coefficients in the power series expansion of A(x) = Sum_{n=-oo..+oo} n*(n+1)/2 * x^(2*n) * (1 - x^n)^(n-2).at n=50A356775
• a(n) = a(n-1) + a(n-2) + 1 with a(0)=2 and a(1)=2.at n=19A377628
• Numbers k such that one can make an equilateral triangle from a chain of linked rods of length 1, 2, 3, ..., k, with perimeter equal to the total length.at n=26A382632