80730

Appears in sequences

• Binomial coefficients C(n,5).at n=27A000389
• Binomial coefficients C(2*n+5,5).at n=11A002299
• Degrees of irreducible representations of Conway group Co1.at n=9A003903
• Binomial coefficient C(3n,n-4).at n=5A004322
• Binomial coefficient C(27,n).at n=5A010943
• Binomial coefficient C(27,n).at n=22A010943
• a(n) = binomial(n,22).at n=5A010975
• T(n,5), array T as in A050186; a count of aperiodic binary words.at n=22A050190
• a(n) = binomial(n, floor(n/5)).at n=27A051052
• a(n) = binomial(n, round(sqrt(n))).at n=27A055789
• Composite numbers k such that the difference between the odd and even aliquot parts of k divides k.at n=37A066193
• Number of subsets of {1,2,...,n} in which exactly half of the elements are less than or equal to sqrt(n).at n=27A102366
• Triangle, read by rows, where T(n,k) = C(n*(n-1)/2-k*(k-1)/2+n-k+2, n-k).at n=30A107870
• Triangle, read by rows, where T(n,k) = C( n*(n+1)/2 + n-k + 1, n-k), for n>=k>=0.at n=22A121335
• Heptagonal numbers A000566 which are the sum of two other heptagonal numbers > 0.at n=27A133251
• a(n) is the number of incongruent two-color bracelets of n beads, 10 from them are black (A005515), having a diameter of symmetry.at n=44A189980
• a(n) is the number of incongruent two-color bracelets of n beads, 10 from them are black (A005515), having a diameter of symmetry.at n=45A189980
• Number of faces of dimension n in a tight triangulation of the manifold OP^2.at n=4A202289
• Lower Pythagorean twins.at n=32A228876
• Upper Pythagorean twins.at n=31A228877