18440

Appears in sequences

• Theta series of laminated lattice LAMBDA_12^{mid}.at n=4A006913
• Numerators of continued fraction convergents to sqrt(549).at n=5A042050
• Number of staircase polygons of perimeter 2n with one (staircase polygon) hole on square lattice (not allowing rotations).at n=5A057410
• Maximal number of 1432 patterns in a permutation of 1,2,...,n.at n=32A100354
• Expansion of x^2*(1-x)*(x^2+x+1)*(x^6+x^3+1)/((2*x-1)*(2*x^9-x^6+x^3-1)).at n=16A111662
• Number of nX3 0..3 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.at n=3A203250
• Number of nX4 0..3 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.at n=2A203251
• T(n,k)=Number of nXk 0..3 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.at n=17A203252
• T(n,k)=Number of nXk 0..3 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.at n=18A203252
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant n+1.at n=29A211142
• Volatile sequence: a(n) = A018227(n)-6.at n=42A271998
• Number of nX4 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2.at n=4A275086
• T(n,k)=Number of nXk 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2.at n=32A275090
• Number of 5Xn 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2.at n=3A275093
• G.f.: Limit_{K->oo} Sum_{n=-oo..+oo} x^(n-K) * (1 - x^n + n*(n+1)/6 * x^(n+K))^n.at n=46A292177
• Number of subsets of {1..n} containing n such that every subset has a different sum.at n=32A325866
• Number of near-magic (only short lines are magic) knight's tours on a 4 X 2n board.at n=9A330610