18749

Properties

Appears in sequences

• Number of partitions of n, with three kinds of 1,2,3 and 4 and two kinds of 5,6,7,...at n=14A000711
• Least prime in A031926 (lesser of 8-twins) whose distance to the next 8-twin is 6*n.at n=40A052353
• Prime number spiral (clockwise, South spoke).at n=23A054566
• Numbers k such that k^4 == 1 (mod 5^5).at n=23A056102
• a(n) = the first prime in the orbit of n under f(n) = n + the first prime > n, or 0 if no such prime exists.at n=14A089750
• a(n) = the first prime in the orbit of n under f(n) = n + the first prime > n, or 0 if no such prime exists.at n=31A089750
• Primes of the form a^2 + b^2 + c^2 such that a^4 + b^4 + c^4 is prime as well and larger than the first one.at n=34A126118
• Primes congruent to 46 mod 59.at n=34A142773
• Primes congruent to 22 mod 61.at n=35A142820
• Primes of the form 10n^2+6n+1.at n=17A154409
• a(n) = 625*n - 1.at n=29A158374
• a(n) = 30*n^2 - 1.at n=24A158560
• Primes of the form x^2+2^x+y^2+2^y, with x and y nonnegative.at n=16A162576
• Numerator of A166100(A166101(n))/A166102(n).at n=34A166272
• Numbers n with property that n==5 (mod 12) and 2^(m-1)=1 (mod m) where m=(2*n-1)*n.at n=7A188063
• a(n) = 6*5^n-1.at n=5A198764
• Primes of the form (m^2+1)/10.at n=41A207337
• Primes of the form m = 5^i + 5^j - 1, where i > j >= 0.at n=7A239715
• Least prime p such that 2*prime(p*n)+1 = prime(q*n) for some prime q.at n=38A260882
• P(n,k) is an array read by rows, with n > 0 and k=1..5, where row n gives the chain of 5 consecutive primes {p(i), p(i+1), p(i+2), p(i+3), p(i+4)} having the symmetrical property p(i) + p(i+4) = p(i+1) + p(i+3) = 2*p(i+2) for some index i.at n=4A267028