a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1 <= i <= j < n, n >= 2, with initial terms 3,4.
A026442
a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1 <= i <= j < n, n >= 2, with initial terms 3,4.
Terms
- a(0) =3a(1) =4a(2) =5a(3) =6a(4) =7a(5) =9a(6) =10a(7) =12a(8) =13a(9) =16a(10) =18a(11) =21a(12) =22a(13) =25a(14) =28a(15) =30a(16) =31a(17) =32a(18) =33a(19) =36a(20) =37a(21) =40a(22) =42a(23) =43a(24) =45a(25) =46a(26) =50a(27) =52a(28) =54a(29) =55
External references
- oeis: A026442