263449

Appears in sequences

• 1/9 the number of (n+1) X 8 0..2 arrays with all 2 X 2 subblocks having the same four values.at n=16A184046
• Number of n X 4 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.at n=14A223773
• Number of maximal irredundant sets in the n-antiprism graph.at n=14A291054
• G.f.: Product_{j>=1} (1 + p(x^j)), where p(x) is the g.f. of A000040.at n=25A309950
• Number of vertices in the hyperoctahedral (or cocktail party) graph of order n.at n=26A368756