40867

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 5.at n=31A023293
• Least prime in A031930 (lesser of 12-twins) whose distance to the next 12-twin is 2*n.at n=35A052355
• a(n) is the least prime not already used such that the frequencies of the decimal digits in the first n terms are almost equal, i.e., for any two digits, their numbers of occurrences differ by no more than 1.at n=5A110457
• Numbers k such that (9^k - 5^k)/4 is prime.at n=6A128346
• Number of arrays of -1..1 integers x(1..n) with every x(i) in a subsequence of length 1 or 2 with sum zero.at n=13A193641
• Number of nX2 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.at n=6A232289
• T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.at n=34A232295
• Number of 7Xn 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.at n=1A232301
• Number of partitions p = [x(1), ..., x(k)], where x(1) >= x(2) >= ... >= x(k), of n such that max(x(i) - x(i-1)) <= number of distinct parts of p.at n=44A241819
• Numbers whose septenary, octal and nonary representations are prime when read in decimal.at n=28A281252
• Number of numbers expressible as b(1)*b(2)*...*b(n) with 1 <= b(i) <= i for each i.at n=13A345882
• Primes p such that the polynomial x^7 - 7*x + 3 (mod p) is the product of seven linear factors.at n=23A358147
• Prime numbersat n=4280