42099

Appears in sequences

• Numbers having four 6's in base 9.at n=9A043480
• Number of base 7 circular n-digit numbers with adjacent digits differing by 1 or less.at n=10A124700
• Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition.at n=4A160885
• Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and an odd number of ones in each row.at n=7A162054
• Expansion of Sum_{n>=0} (3*n)!/n!^3 * x^(2*n)/(1-3*x)^(3*n+1).at n=6A208426
• a(n) = (u+1)^n + (-s-1)^n + (t+1)^n + (-1)^n + (-t+1)^n + (s-1)^n + (-u+1)^n where s = sqrt(2), t = sqrt(2-s), u = sqrt(2+s).at n=10A215503
• Triangle T(n,w) read by rows: the number of fixed polyominoes with n cells and width w of the convex hull.at n=59A308359
• a(n) is the integer part of the area of a regular n-gon whose side lengths are n.at n=24A374296