62847

Appears in sequences

• Numbers k such that s(k) + s(k+1) + s(k+2) = t(k) + t(k+1) + t(k+2) where s(k) = sigma(k) - k, t(k) = |s(k) - k|.at n=9A033910
• Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.at n=19A297884
• E.g.f. satisfies A(x) = 1 + (exp(x*A(x)^2) - 1)/A(x)^2.at n=7A377347