Triangle of "canonical" optimal Golomb rulers.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =2a(6) =1a(7) =3a(8) =5a(9) =2a(10) =1a(11) =3a(12) =6a(13) =2a(14) =5a(15) =1a(16) =3a(17) =6a(18) =8a(19) =5a(20) =2a(21) =1a(22) =3a(23) =5a(24) =6a(25) =7a(26) =10a(27) =2a(28) =1a(29) =4