a(n) is the least positive integer > a(n-1) and not a(j)*a(k) + a(k)*a(i) + a(i)*a(j) for 1 <= i < j < k <= n.
A026505
a(n) is the least positive integer > a(n-1) and not a(j)*a(k) + a(k)*a(i) + a(i)*a(j) for 1 <= i < j < k <= n.
Terms
- a(0) =1a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =14a(13) =15a(14) =16a(15) =17a(16) =18a(17) =20a(18) =21a(19) =22a(20) =24a(21) =25a(22) =26a(23) =28a(24) =30a(25) =32a(26) =33a(27) =36a(28) =37a(29) =38
External references
- oeis: A026505