99377

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 4x + 9.at n=26A023312
• Number of permutations of n elements not containing the consecutive pattern 123.at n=9A049774
• Largest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.at n=4A077362
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k doubledescents (0 <= k <= n-2). We say that i is a doubledescent (also called a double fall) of a permutation p if p(i) > p(i+1) > p(i+2).at n=30A162975
• Exponential Riordan array, defining orthogonal polynomials related to permutations without double falls.at n=45A182822
• Number of partitions of n with difference -10 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=50A242682
• Prime numbersat n=9538