18727

Appears in sequences

• Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code.at n=17A030505
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 19 ones.at n=14A031787
• Numbers having four 4's in base 8.at n=22A043440
• Number of self-avoiding planar walks of length n starting at (0,0), ending on the x-axis, remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) with the restriction that (0,1) is never used below the diagonal and (1,0) is never used above the diagonal.at n=11A284415