75819

Appears in sequences

• Number of connected graphs on n labeled nodes on a circle with straight-line edges that don't cross.at n=7A007297
• Number array whose rows are the series reversions of x(1-x)/(1+x)^k, read by antidiagonals.at n=51A107111
• Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.at n=6A221731
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.at n=34A221736
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.at n=34A221937
• Reversion of g.f. for A162395 (squares with signs).at n=7A263843
• Expansion of Sum_{k>=1} (-1 + Product_{j>=1} 1/(1 - x^(k*j))^j).at n=19A302549