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 2,3.
A026439
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 2,3.
Terms
- a(0) =2a(1) =3a(2) =4a(3) =6a(4) =9a(5) =10a(6) =12a(7) =13a(8) =14a(9) =16a(10) =18a(11) =20a(12) =21a(13) =22a(14) =24a(15) =28a(16) =30a(17) =32a(18) =33a(19) =34a(20) =36a(21) =37a(22) =40a(23) =42a(24) =44a(25) =45a(26) =46a(27) =48a(28) =49a(29) =50
External references
- oeis: A026439