a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n and a(1) = 1, a(2) = 5.

A003667

a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n and a(1) = 1, a(2) = 5.

Terms

    a(0) =1a(1) =5a(2) =6a(3) =7a(4) =8a(5) =9a(6) =10a(7) =12a(8) =20a(9) =22a(10) =23a(11) =24a(12) =26a(13) =38a(14) =39a(15) =40a(16) =41a(17) =52a(18) =57a(19) =69a(20) =70a(21) =71a(22) =82a(23) =87a(24) =98a(25) =102a(26) =113a(27) =119a(28) =129a(29) =130

External references