32059

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 3x + 2.at n=25A023277
• Primes that remain prime through 4 iterations of function f(x) = 4x + 3.at n=14A023311
• Primes that remain prime through 5 iterations of function f(x) = 4x + 3.at n=3A023339
• Numbers k such that k concatenated with k 1's is a prime.at n=20A068817
• An inverse Chebyshev transform of the Fibonacci numbers.at n=14A100095
• Number of compositions of n such that the least part occurs with even multiplicity.at n=16A105201
• Numerators of partial sums of a series for sqrt(5).at n=6A123747
• a(n) = (n^3 + 3*n - 2)/2.at n=39A132127
• Primes p1 such that p1^2+p2^3=pp are average of twin primes. p1 and p2 consecutive primes, p1 < p2.at n=32A138715
• a(n) = 5^n*Sum_{ k=0..n } binomial(2*k,k)/5^k.at n=6A144635
• Depression-type primes with five digits; from left to right digits decrease to and increase from the central digit.at n=15A157083
• a(n) is the smallest prime of the form 4k + 3 such that the first n iterations of the map p -> 4p + 3 are prime with the next iteration being composite.at n=5A179767
• Expansion of d/dx log(1/(1-x/sqrt(1-4*x^2))).at n=12A189053
• Primes of the form p^2 + 2q^2 with p and q odd primes.at n=34A201613
• Primes of the form p^2 + 18, where p is prime.at n=19A201688
• Greater of twin primes of (40n-23,40n-21).at n=38A244505
• Primes p such that p = q^2 + 2*r^2 where q and r are also primes.at n=35A260553
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 347", based on the 5-celled von Neumann neighborhood.at n=35A271299
• Prime numbers p such that p - 2, p^2 - p - 1, p^2 - p + 1 are prime numbers.at n=11A274525
• a(n) = Sum_{k=1..n} k^2*phi(k), where phi is the Euler totient function A000010.at n=20A319087