-771

Appears in sequences

• a(1) = 1, a(2n) = a(2n-1) + c(n) and a(2n+1) = a(2n) - p(n), where c(n)=A002808(n) and p(n)=A000040(n) are the n-th composite and n-th prime numbers, respectively.at n=58A073891
• Triangle of polynomial coefficients of the polynomial factors defined in A074051.at n=69A197184
• Values of n such that L(7) and N(7) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=13A226927
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood.at n=21A270464
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 467", based on the 5-celled von Neumann neighborhood.at n=23A272321
• a(1) = 1; a(n+1) = -Sum_{d|n} a(d)^(n/d).at n=48A307781
• First term of n-th difference sequence of (floor(k*r)), r = sqrt(1/2), k >= 0.at n=12A325729
• Expansion of Sum_{k>=0} k * x^k/(1 + k^2 * x).at n=6A349859