83566

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * A026736(n,k).at n=13A027219
• Harary index of the n X n bishop graph.at n=27A296197
• Expansion of g.f. A(x) satisfying A( A(x)^2 ) = x*A(x)/(1 - 2*A(x)).at n=8A372527