33937

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 6x + 5.at n=30A023317
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 40.at n=4A031628
• Fifth term of strong prime sextets: p(m-3)-p(m-4) > p(m-2)-p(m-3) > p(m-1)-p(m-2) > p(m)-p(m-1) > p(m+1)-p(m).at n=10A054817
• Primes of the form 16*m^2 + 81, m=1,2,3,...at n=9A087861
• Primes p such that p's set of distinct digits is {3,7,9}.at n=21A108385
• Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 5 and repeat; as m = 1,2,3,.. the remaining terms form this sequence.at n=11A112563
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.at n=8A150498
• Primes p such that p,q,r,s are consecutive primes and 2p+9, 2q+9, 2r+9, 2s+9 are also primes.at n=9A190354
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.at n=7A207265
• Expansion of 1/(1 - x - x^2 + x^7 - x^9).at n=23A225394
• Primes of the form n^2 + 81.at n=18A256775
• Primes having only {3, 7, 9} as digits.at n=39A260382
• Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.at n=17A262700
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood.at n=30A288586
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood.at n=30A289094
• First noncomposite number reached when iterating the map x -> x', when starting from x = A351255(n). Here x' is the arithmetic derivative of x, A003415.at n=51A351259
• Prime numbers of the form A385986(1) + ... + A385986(k) for some k > 0.at n=36A385987
• Prime numbersat n=3634