18902

Appears in sequences

• a(0) = 1, a(n) = 21*n^2 + 2 for n>0.at n=30A010011
• Number of 3-element antichains on an unlabeled n-element set; equivalence classes of monotone Boolean functions of n variables with 3 mincuts under action of symmetric group S_n.at n=15A056778
• Number of right triangles on a (n+1)X6 grid.at n=19A189810
• Largest number in a 6-tuple (a,b,c,d,e,f) of positive integers satisfying the Markoff(6) equation a^2 + b^2 + c^2 + d^2 + e^2 + f^2 = 3*a*b*c*d*e*f.at n=38A227204
• The Szeged index of the n-sunlet graph (n>=3).at n=23A228600
• Number of partitions of (4, n) into a sum of distinct pairs.at n=24A268347