57643

Appears in sequences

• Expansion of g.f.: (1-2*x)/(1-3*x+2*x^3).at n=12A052948
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0010 pattern in any orientation.at n=10A146633
• Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.at n=5A221374
• T(n,k)=Number of n X k arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.at n=22A221378
• T(n,k)=Number of n X k arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.at n=26A221378
• a(n) = a(n-1) + a(n-3) unless a(n-1) and a(n-3) are both even in which case a(n) = (a(n-1) + a(n-3))/2, with a(0) = a(1) = a(2) = 1.at n=38A341312
• Numbers that are the sum of nine fifth powers in three or more ways.at n=9A345620
• Numbers that are the sum of nine fifth powers in exactly three ways.at n=8A346338