18163

Appears in sequences

• Numbers k such that in k and k^2 the parity of digits alternates.at n=36A030153
• 3n^3 + 2n^2 + n + 1.at n=18A130884
• Numbers k such that 1 + 20^k + 200^k is prime.at n=6A171247
• Numbers n such that n!! - 2^8 is prime.at n=25A265114
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 57", based on the 5-celled von Neumann neighborhood.at n=29A270077
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 350", based on the 5-celled von Neumann neighborhood.at n=36A271303
• Semiprimes followed by successive gaps 4, 6, 9.at n=2A320285
• Number of terms in polynomial sequence s(n) = x*y*z*(s(n-1)*s(n-3) + s(n-2)^2)/s(n-4), with s(1) = x, s(2) = s(3) = 1, s(4) = y.at n=24A338218
• Number of integer partitions of n with a permutation that has no consecutive monotone triple, i.e., no triple (..., x, y, z, ...) such that either x <= y <= z or x >= y >= z.at n=38A344740