89330

Appears in sequences

• 6th power analog of Keith numbers.at n=14A281917
• The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.at n=21A330851
• a(n) = Sum_{k=0..floor(2*n/9)} binomial(2*n-6*k,3*k).at n=17A392405