21956

Appears in sequences

• Expansion of (1-x)^(-1)/(1+x-x^2-2*x^3).at n=41A077901
• Antidiagonal sums of table A096751.at n=13A096753
• Members of 3-cycles of permutation A111273.at n=18A113701
• Arises in enumerating non-degenerate colorings in Brook's Theorem.at n=10A152390
• a(n) = 36*Fibonacci(2*n+1) - 4.at n=7A153981
• Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + x)/(1 - 3*x - 5*x^2).at n=7A179606
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^3>x^3+y^3.at n=36A211811
• a(n) = n(p(n)-d(n)): sum of all of parts of all partitions of n with at least one distinct part.at n=21A220486
• a(n) = n^3 + 4.at n=28A274077
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 459", based on the 5-celled von Neumann neighborhood.at n=15A282365
• Numbers that are the sum of seven fourth powers in seven or more ways.at n=11A345573
• Numbers that are the sum of seven fourth powers in exactly seven ways.at n=4A345829