34672

Appears in sequences

• a(n) = 2*a(n-1) + 4*a(n-2) - 2*a(n-3) with initial terms 1, 4, 13.at n=9A091141
• a(n) = A000085(n) - A000079(n-1).at n=10A122932
• Convolution of nonzero octagonal numbers (A000567) with themselves.at n=9A276159
• Number of quadrilateral regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles.at n=24A324043
• Main diagonal of A332359.at n=18A332360
• Number of permutations sigma of [n] such that (sigma(k) mod sigma(k+1)) <= (sigma(k+1) mod sigma(k+2)) for 1 <= k <= n - 2.at n=14A332800
• Number of digraphs on n unlabeled nodes whose strongly connected components are complete digraphs.at n=6A361583