134644

Appears in sequences

• First row of infinite array A(j,k): A(j,1) = j-1; A(1,k) = A(2,k-1); for j, k > 1, A(j,k) = A(j-1,k) - A(j+1,k-1) if that number is positive and not already in column k, A(j,k) = A(j-1,k) + A(j+1,k-1) otherwise.at n=24A140985
• Q_n(4) (see A104035).at n=5A156132
• Number of maximal independent vertex sets (and minimal vertex covers) in the n-wheel graph.at n=39A290612
• Number of maximal independent vertex sets and minimal vertex covers in the n-trapezohedral graph.at n=20A367644