190080

Appears in sequences

• Denominator of mass (Sum 1/|Aut(H)|) of Hadamard matrices of order 4n.at n=2A048616
• Number T(n,m) of n X m matrices over {0,1,2} with all row and column sums equal to 1 or 2, m=0,..,2*n.at n=30A062154
• Number of n X n matrices over {0,1,2} with all row and column sums equal to 1 or 2.at n=5A062156
• Hook products of all partitions of 11.at n=38A093790
• Hook products of all partitions of 11.at n=39A093790
• Sigma(A033631(n)) {sigma is the sum of divisors function A000203}.at n=25A115619
• a(n) = (32/2)*(n-1)*(n-2)*(n-3)*(n-4).at n=12A134175
• Number of ways to choose n positive integers less than or equal to 2n such that none of the n integers divides another.at n=44A174094
• Denominators of the swinging Bernoulli number b_n.at n=10A182918
• a(n) = n*(n+2)*(n+4)*(n+6).at n=17A190577
• The number of sets of n positive integers strictly less than 2*n such that no integer in the set divides another.at n=44A192298
• Related to number of Hadamard matrices of order 4n.at n=2A199006
• Related to number of cocyclic Hadamard matrices of order 4n.at n=2A199007
• Order of largest automorphism group of a Hadamard matrix of order 4n.at n=2A206707
• Number of elements of order n in the simple unitary group U2(5).at n=3A284984
• a(n) = n! / Product_{p prime < n}.at n=11A300902
• Numbers whose infinitary divisors have a mean infinitary abundancy index that is larger than 2.at n=17A374788
• Triangle read by rows: T(n, k) = (n - k)!*(n + k)!/n!.at n=33A377660
• E.g.f. A(x) satisfies A(x) = exp( arcsinh(x * A(x)^4) ).at n=5A385442
• a(n) = Sum_{k=0..n} (1-i)^k * (1+i)^(n-k) * binomial(n+3,k) * binomial(n+3,n-k), where i is the imaginary unit.at n=7A387403