40853

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 57.at n=1A031645
• Numbers n such that 2*p(n)+3, 2*p(n+1)+3, 2*p(n+2)+3 are consecutive primes, where p(i) denotes the i-th prime.at n=27A088066
• Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1101-0111 pattern in any orientation.at n=15A146726
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11110-01111 pattern in any orientation.at n=12A147508
• a(n) = 14*n^3 - 30*n^2 + 24*n - 7.at n=14A155883
• Coefficients of auxiliary tree counting function S_{1,0}(x).at n=10A196469
• Primes p such that every suffix of the ternary (base-3) representation of p is a prime.at n=44A278696
• 7th power analog of Keith numbers.at n=15A281918
• Prime numbersat n=4279