a(1) = 1, a(2) = 2, a(3) = 4, and for n > 3, a(n) is the least positive integer > a(n-1) not of form a(i)*a(j)*a(k) for 1 <= i <= j <= k < n.
A026480
a(1) = 1, a(2) = 2, a(3) = 4, and for n > 3, a(n) is the least positive integer > a(n-1) not of form a(i)*a(j)*a(k) for 1 <= i <= j <= k < n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =7a(6) =9a(7) =11a(8) =13a(9) =15a(10) =17a(11) =19a(12) =21a(13) =23a(14) =27a(15) =29a(16) =31a(17) =33a(18) =37a(19) =39a(20) =41a(21) =43a(22) =47a(23) =51a(24) =53a(25) =57a(26) =59a(27) =61a(28) =67a(29) =69
External references
- oeis: A026480