26865

Appears in sequences

• Expansion of x/((1-x)*(1-x^2-2*x^3)).at n=25A077882
• Odd composites (including 1 in the count) where the number 1 mod 4 equals the number 3 mod 4.at n=4A093180
• Values of x in solutions (x,y,z) to the Diophantine equation x^3-x^2+y^3-y^2=z^3-z^2, with 1<x<y<z.at n=35A138667
• Number of nX2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.at n=14A196140
• Number of ballot sequences of length n having exactly eight descents.at n=2A241801
• Number of inequivalent (mod D_4) ways four checkers can be placed on an n X n board.at n=5A242279
• Number of n X 4 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s.at n=6A296015
• Number of nX7 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s.at n=3A296018
• T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s.at n=48A296019
• T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s.at n=51A296019
• Composite numbers k, not squarefree semiprimes, such that k' is a sum of distinct primorial numbers, where k' stands for the arithmetic derivative of k, A003415.at n=55A369642
• Number of connected subsets of n edges of the cuboctahedron up to the 48 rotations and reflections of the cuboctahedron.at n=15A383982