138560

Appears in sequences

• Number of nX1 0..2 arrays with exactly floor(nX1/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=17A222395
• Number of nX2 0..2 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.at n=8A222684
• G.f. satisfies A(x) = Sum_{n>=1} A(x^(2*n))/A(x^n), with A(0) = 0 and A'(0) = 1.at n=9A378259