34290

Appears in sequences

• Period of the Lucas 4-step sequence A073817 mod n.at n=37A106295
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (-1, 0), (0, -1), (0, 1), (1, 0), (1, 1)}.at n=8A151474
• Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, down, up, down, down.at n=2A177673
• Numbers n with the property that it is possible to write the base 2 expansion of n as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have sigma(a)*sigma(b) = n.at n=18A244079
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood.at n=35A272512
• Numbers k such that (55*10^k + 89)/9 is prime.at n=21A291870
• Expansion of Product_{k>=1} 1/(1 - phi(k)*x^k), where phi = Euler totient function (A000010).at n=22A319111