136448

Appears in sequences

• Modulo 2 recursion switch between A000898 and A121966: A000898 first.at n=10A122018
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 8 king-move adjacent elements, with upper left element zero.at n=8A305242
• Irregular triangle read by rows: T(n,k) (n>=2, 0<=k<=n) = total number of unbranched k-catapolyheptagons with k pentagons and n-k heptagons.at n=58A323850
• G.f.: K(4*sqrt(x)) / E(4*sqrt(x)), where E(), K() are complete elliptic integrals.at n=5A328128
• a(n) is the least number that has exactly n divisors and the differences between its consecutive divisors (ordered by size) are distinct.at n=35A384097