246641

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 39.at n=24A031627
• Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,1 0,-2 1,0 or -1,0.at n=19A264300
• Prime numbersat n=21764