55547

Properties

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} T(n,k), T given by A026769.at n=14A026777
• Number of partitions of n into parts not of the form 21k, 21k+5 or 21k-5. Also number of partitions with at most 4 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=45A035983
• a(n) is the largest prime before A002279(n).at n=4A099665
• Primes p such that 5*p - 6 is square.at n=26A110482
• Primes p such that q-p = 32, where q is the next prime after p.at n=15A126784
• Primes containing the string 555.at n=9A167281
• Primes having only {4, 5, 7} as digits.at n=25A217039
• Expansion of ( 2+x-x^2+x^3 ) / (1-x^2-x)^3 .at n=13A261054
• Numbers k such that (35*10^k - 737)/9 is prime.at n=20A295397
• Prime numbersat n=5637