28155

Appears in sequences

• Numbers k such that 2*k+1, 4*k+1, 8*k+1 and 16*k+1 are primes.at n=24A124412
• E.g.f. (even powers only) cos(x)^(cos(x)-1).at n=5A191463
• Meandric numbers for a river crossing up to 9 parallel roads at n points.at n=12A209621
• Number of (w,x,y) with all terms in {0,...,n} and w != max(|w-x|,|x-y|,|y-w|).at n=30A213498
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 189", based on the 5-celled von Neumann neighborhood.at n=34A270679
• a(1) = 1; for n > 1, a(n) = 4*a(A252463(n)) + (n mod 4).at n=38A292384