210308

Appears in sequences

• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+16807)^2 = y^2.at n=19A118576
• Numerators of the n-th iteration of the alternating continued fraction formed from the positive integers, starting with (1 - ...).at n=7A262957
• Number of nX4 0..2 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=3A282127
• T(n,k)=Number of nXk 0..2 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=24A282130
• Number of linear chord diagrams having n chords and minimal chord length ten.at n=2A293923
• Number of linear chord diagrams having n+2 chords and minimal chord length n.at n=9A321311