25981

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 79.at n=17A020418
• Primes base 10 that remain primes in six bases b, 2<=b<=10, expansions interpreted as decimal numbers.at n=9A052028
• Primes p such that the sum of the digits of p is not prime, but the sum of each digit raised to the 4th power is prime.at n=22A091368
• Number of ON states after n generations of cellular automaton based on f.c.c. lattice with each cell adjacent to its twelve neighbors.at n=30A151776
• Primes p such that (p+18), (p+36) and (p+72) are also prime.at n=29A175158
• Number of arrangements of 4 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=24A188359
• Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| != w+x+y.at n=29A213480
• Primes p such that p = 361 + 420*k for some k.at n=24A217656
• a(n) = 836*2^n - 771.at n=5A305264
• A331757(n)/2.at n=19A331758
• Number of polyominoes of n cells with both horizontal and vertical symmetries, for which the 180-degree rotational symmetry has an axis that coincides with the center of a square, but without 90-degree rotational symmetry.at n=35A351190
• Consecutive states of the linear congruential pseudo-random number generator for 16-bit WATFOR/WATFIV when started at 1.at n=33A384158
• Prime numbersat n=2858