-1551

Appears in sequences

• a(n) = 13 + 12*n - n^2.at n=46A136316
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 337", based on the 5-celled von Neumann neighborhood.at n=21A271288
• L.g.f.: log(Product_{k>=1} (1 + x^k/(1 - x))) = Sum_{k>=1} a(k)*x^k/k.at n=47A307761
• G.f. satisfies A(x) = 1 + x*A(x) / (1 + x)^4.at n=16A365083
• Square array A(n, k) = A246278(1+n, k) - 2*A246278(n, k), read by falling antidiagonals, where A246278 is the prime shift array.at n=62A372562