a(n) = smallest number k such that P(k)/P(k+1) > P(k+1)/P(k+2) > ... > P(k+n+1)/P(k+n+2), where P(k) = k-th prime = A000040(k).

A133697

a(n) = smallest number k such that P(k)/P(k+1) > P(k+1)/P(k+2) > ... > P(k+n+1)/P(k+n+2), where P(k) = k-th prime = A000040(k).

Terms

    a(0) =1a(1) =7a(2) =69a(3) =420a(4) =1796a(5) =12073a(6) =101397a(7) =1139211a(8) =5440508a(9) =320620306a(10) =2058187481a(11) =36451609409a(12) =54594153615

External references