27493

Appears in sequences

• a(n) = A026626(2*n-1, n-2).at n=7A026631
• Numerators of continued fraction convergents to sqrt(362).at n=2A041684
• Numbers k such that |2^(2*k-27)-27| is prime.at n=11A138598
• Smallest k such that k^2+1 is divisible by A002144(n)^4.at n=2A145297
• a(n) is smallest number such that a(n)^2 + 1 is divisible by 17^n.at n=4A218710
• a(n) = n*(n^2 + 3)/2.at n=38A229183
• One of the two successive approximations up to 17^n for 17-adic integer sqrt(-1). Here the 4 (mod 17) case (except for n=0).at n=4A286877
• Bases b for which there exists an integer y such that y^3 in base b looks like [c,d,c,d] for some base-b digits c, d.at n=47A290176
• Number of partitions of n into 8 distinct and relatively prime parts.at n=49A340719
• Square array read by downward antidiagonals: A(n, 1) = A185103(n) and A(n, k) = A185103(A(n, k-1)) for k > 1.at n=17A353601
• a(n) is the numerator of Sum_{k = 0..n} fusc(k)/fusc(k+1) (where fusc is Stern's diatomic series A002487).at n=25A355075
• Number of edges of the Minkowski sum of n simplices with vertices e_(i+1), e_(i+2), e_(i+3) for i=0,...,n-1, where e_i is a standard basis vector.at n=9A357592
• Number of polycubes of size n and symmetry class BE.at n=17A376977