Numbers m such that d(m) = d(m+1) and d(k) < d(m) for all k < m such that d(k) = d(k+1), where d(m) is the number of divisors of m (A000005).

A333052

Numbers m such that d(m) = d(m+1) and d(k) < d(m) for all k < m such that d(k) = d(k+1), where d(m) is the number of divisors of m (A000005).

Terms

    a(0) =2a(1) =14a(2) =44a(3) =104a(4) =735a(5) =2295a(6) =5264a(7) =5984a(8) =21735a(9) =201824a(10) =3341624a(11) =6481475a(12) =7316000a(13) =49727600a(14) =103488384a(15) =205684479a(16) =349167104a(17) =391738599a(18) =1921172175a(19) =6110171144a(20) =7616307699

External references