26510

Appears in sequences

• Graham-Sloane-type lower bound on the size of a ternary (n,3,8) constant-weight code.at n=6A030508
• Eigentriangle by rows, n terms of (10 * A002535) followed by A002535(n).at n=34A143970
• Numbers k such that (2^(2k + 1) - 2)/3 + k - 1 is prime.at n=14A236547
• Least integer k such that k/2^n > (1+sqrt(5))/2 (the golden ratio).at n=14A293314
• The integer k that minimizes |k/2^n - r|, where r = golden ratio.at n=14A293315
• Number of triangles larger than size=1 in a matchstick-made hexagon with side length n.at n=20A307253
• Number of series-reduced planted achiral trees whose leaves span an initial interval of positive integers appearing with multiplicities an integer partition of n.at n=37A317099
• Numbers of squares formed by this procedure on n-th step: Step 1, draw a unit square. Step n, draw a unit square with center in every intersection of lines of the figure in step n-1.at n=21A336288
• Convolution of A000041 and A237271.at n=28A390878