63940

Appears in sequences

• Triangle T(n,k) of the number of digraphs with a source on n labeled nodes with k arcs, k=0..n*(n-1).at n=31A057274
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+119)^2 = y^2.at n=35A129837
• Solutions y of the Mordell equation y^2 = x^3 - 3a^2 + 1 for a = 0,1,2, ... (solutions x are given by the sequence A000466).at n=20A173202
• Number of n X 2 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.at n=8A203365
• T(n,k)=Number of nXk 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.at n=46A203371
• Number of compositions of n with all adjacent parts (x, y) satisfying x < 2y and y <= 2x.at n=30A342338