20353

Properties

Appears in sequences

• Incorrect duplicate of A297408.at n=17A007355
• Numbers k such that the continued fraction for sqrt(k) has period 55.at n=24A020394
• Third member of a sexy prime quadruple: value of p+12 such that p, p+6, p+12 and p+18 are all prime.at n=35A046123
• Expansion of (1-x)^(-1)/(1-2*x+2*x^3).at n=20A077853
• G.f. satisfies A(x) = 1 + x*A(x)^2*A(x*A(x)).at n=7A088714
• Primes p such that p + 2^2, p + 4^2 and p + 6^2 are also primes.at n=32A092475
• Primes of the form 256n+129.at n=21A105130
• Primes p such that their cubes are pandigital.at n=10A124629
• Primes of the form 57x^2+18xy+193y^2.at n=35A140631
• Primes congruent to 57 mod 59.at n=39A142784
• Primes congruent to 40 mod 61.at n=39A142838
• Index sequence to A089840: positions of bijections that preserve A127302 (the non-oriented form of binary trees) and whose behavior does not depend on whether there are internal or terminal nodes (leaves) in the neighborhood of any vertex.at n=42A153830
• Primes of the form 20*k^2 + 36*k + 17.at n=13A154419
• Primes that start a run of at least seven consecutive primes, where between successive primes exactly one digit changes and the resulting digits may be permuted.at n=23A157717
• Primes that are the sum of all composite numbers in-between prime numbers p(n) and p(n+2).at n=24A174521
• Primes p of the form |prime(n+2)^2-prime(n+1)^2-prime(n)^2|, (absolute values).at n=17A176134
• a(n) = DP(n) is the total number of k-double-palindromes of n, where 2 <= k <= n.at n=20A180750
• Expansion of q^(-5/24) * eta(q^3)^3 / eta(q)^4 in powers of q.at n=12A187428
• Primes of the form 128*k + 1.at n=37A208177
• a(n) = floor( Pi^(n/3) ).at n=25A212464