21335

Appears in sequences

• Number of nX4 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=5A227087
• T(n,k)=Number of nXk binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=39A227089
• T(n,k)=Number of nXk binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=41A227089
• Expansion of the g.f. (x^2-x+1)*(x^2-3*x+3)/(x-1)^6.at n=16A257890
• Numbers with at least three digits and with the property that the sum of the cubes of the first and last digit equals the number obtained when the first and last digits are deleted.at n=39A275343
• Partial sums of A299272.at n=25A299273
• Number of connected subsets of n edges of the icosidodecahedron up to the 120 rotations and reflections of the icosidodecahedron.at n=9A383984
• a(n) = Sum_{k=0..n} (-1)^k * binomial(4*n-k+2,n-k).at n=5A390547