25591

Appears in sequences

• Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).at n=12A001938
• Products of 2 successive primes.at n=36A006094
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 45 ones.at n=2A031813
• Multiplicity of highest weight (or singular) vectors associated with character chi_51 of Monster module.at n=50A034439
• a(n) is the smallest composite number c such that A002110(n) + c is prime.at n=35A038771
• a(n) = (6*n+1)*(6*n+7).at n=26A085026
• a(n) = prime(2*n-1)*prime(2*n).at n=18A089581
• Expansion of q^(-1/2) * (eta(q^4) / eta(q))^4 in powers of q.at n=12A093160
• Integer part of n#/(p-7)#, where p=preceding prime to n.at n=34A102792
• Product of the n-th sexy prime pair.at n=21A111192
• Expansion of q * psi(q^8) / phi(-q) in powers of q where psi(), phi() are Ramanujan theta functions.at n=24A123655
• Numbers n such that exactly two positive d in the range d <= n/2 exist which divide binomial(n-d-1, d-1) and which are not coprime to n.at n=31A178098
• Number of strings of numbers x(i=1..8) in 0..n with sum i^4*x(i) equal to 4096*n.at n=12A184354
• Expansion of q * psi(q^8) / phi(q) in powers of q where phi(), psi() are Ramanujan theta functions.at n=24A208605
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >n.at n=15A210291
• Product of adjacent primes with a gap of 6.at n=9A210477
• a(n) = A050376(n)*A050376(n+1) where A050376(n) is the n-th number of the form p^(2^k) with p is prime and k >= 0.at n=43A240521
• Numbers that are both a sum and a product of two or more consecutive primes.at n=19A254859
• Let e_n(k)>=0 denote the exponent of prime(k) in the prime power representation of n. The sequence lists 1 followed by numbers n for which e_n(2*i-1)=e_n(2*i), for all i>=1.at n=42A275407
• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=1} i.at n=42A333297