For n >= 1, a(n) is the least k >= 1 such that 1/d(k) + ... + 1/d(k + n - 1) is an integer, d(i) = A000005(i).

A366048

For n >= 1, a(n) is the least k >= 1 such that 1/d(k) + ... + 1/d(k + n - 1) is an integer, d(i) = A000005(i).

Terms

    a(0) =1a(1) =2a(2) =1a(3) =25a(4) =54a(5) =7a(6) =53a(7) =65a(8) =6a(9) =22a(10) =51a(11) =49a(12) =343a(13) =209a(14) =416a(15) =624a(16) =17a(17) =18a(18) =338a(19) =410a(20) =1622a(21) =341a(22) =140a(23) =849a(24) =139a(25) =337a(26) =1939a(27) =338a(28) =849a(29) =4365

External references