a(1) = 1, a(2) = 2; for n >= 3, a(n) = least positive integer > a(n-1) and not a(i)^2 + a(j)^2 for 1<=i<=j<=n-1.
A026468
a(1) = 1, a(2) = 2; for n >= 3, a(n) = least positive integer > a(n-1) and not a(i)^2 + a(j)^2 for 1<=i<=j<=n-1.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =7a(6) =9a(7) =11a(8) =12a(9) =14a(10) =15a(11) =16a(12) =19a(13) =21a(14) =22a(15) =23a(16) =24a(17) =26a(18) =27a(19) =28a(20) =29a(21) =30a(22) =31a(23) =33a(24) =34a(25) =35a(26) =36a(27) =38a(28) =39a(29) =41
External references
- oeis: A026468