106039

Appears in sequences

• Numbers n such that A112131(n) and A112131(n+1) are both Harshad numbers.at n=2A109464
• Number of unrooted two-vertex (or, dually, two-face) regular planar maps of even valency 2n considered up to orientation-preserving homeomorphism.at n=6A113181
• Number of unrooted two-vertex (or, dually, two-face) regular planar maps of valency n considered up to orientation-preserving homeomorphism.at n=13A113182
• Greatest integer k such that k/2^n < (1+sqrt(5))/2 (the golden ratio).at n=16A293313
• The integer k that minimizes |k/2^n - r|, where r = golden ratio.at n=16A293315
• a(n) is the integer part of the area of a regular n-gon whose side lengths are n.at n=31A374296
• a(n) = k if k is odd otherwise a(n) = k+1 and k = floor( 2^n*(1+sqrt(5))/2 ).at n=16A376448