510935040

Appears in sequences

• a(n) = phi(binomial(2*n,n)*n).at n=15A131928
• Coefficients in expansion of Delta'(q).at n=23A145155
• The number of integers r such that all primes above a certain value have the form primorial(n)*q +- r.at n=9A307826
• For those rows n of A249223 which are weakly increasing, let w(n) denote the maximal entry in the row: sequence gives values of n for which w(n) sets a new record.at n=14A340506