230400

Appears in sequences

• Partial products of pi(n), A000720.at n=11A046993
• Sigma(n) / d(n) is a perfect square associated with A049226.at n=30A049227
• Number of 3-fold-free subsets of {1, 2, ..., n}.at n=20A050293
• a(n) = A056623(n!).at n=11A056628
• a(n) = A056623(n!).at n=12A056628
• a(n) = (2*n*(n+1))^2.at n=15A060300
• Numbers k such that the numerator of Sum_{d|k} 1/d > 3*k.at n=15A069096
• Terms of A025487 which are a multiple of their indices.at n=27A077562
• Hook products of all partitions of 12.at n=28A093791
• Hook products of all partitions of 12.at n=27A093791
• G.f.: 9*(3x+1)/(1+2x-6x^2-27x^3).at n=11A103646
• Squares for which the sum of the digits, the product of the digits, the digital root and the multiplicative digital root are all squares.at n=29A117680
• a(n) is number of permutations (p(1),p(2),p(3),...,p(n)) of (1,2,3,...,n) such that p(k) is coprime to p(n+1-k) for k = all positive integers <= n.at n=10A133922
• a(n) is number of permutations (p(1),p(2),p(3),...,p(n)) of (1,2,3,...,n) such that p(k) is coprime to p(n+1-k) for k = all positive integers <= n.at n=9A133922
• Product of the nonzero exponents in the prime factorization of n!.at n=35A135291
• Sixth degree product sequence: a(n) = product( 1 +4*cos(k*Pi/n)^2 +16*cos(k*Pi/n)^4 +64*cos(k*Pi/n)^6, k=1..(n-1)/2 ).at n=12A152116
• A sixth degree product form sequence: a(n)=Product[(1 + 4*Sin[k*Pi/n]^2 + 16*Sin[k*Pi/n]^4 + 64*Sin[k*Pi/n]^6), {k, 1, Floor[(n - 1)/2]}].at n=12A152143
• Squares s(n) such that cube(n)-square(n)-1 and cube(n)+square(n)+1 are primes.at n=19A155931
• Squares for which no smaller square has the same number of divisors.at n=23A166721
• Totally multiplicative sequence with a(p) = 4*(p+3) for prime p.at n=35A167323