27247

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 15.at n=10A031693
• Number of triples {i,j,k}, i>1, j>1, k>1, such that i*j*k < n^3.at n=17A037092
• Denominators of continued fraction convergents to sqrt(857).at n=13A042655
• Matrix 6th power of partition triangle A008284.at n=56A050300
• Interprimes which are of the form s*prime, s=11.at n=12A075286
• Expansion of c(x^2+x^3), c(x) the g.f. of A000108.at n=17A115178
• a(0)=0, a(1)=1; thereafter a(n) = ceiling((3/2)^(n-3)*n*(n-1)).at n=15A120414
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-1000 pattern in any orientation.at n=15A146419
• a(n) = 225n^2 + 2n.at n=10A158228