a(1)=1; thereafter, a(n) is the smallest number such that both the addition and multiplication tables for (a(1),...,a(n)) contain n*(n+1)/2 different entries (the maximum possible).

A337655

a(1)=1; thereafter, a(n) is the smallest number such that both the addition and multiplication tables for (a(1),...,a(n)) contain n*(n+1)/2 different entries (the maximum possible).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =7a(4) =15a(5) =22a(6) =31a(7) =50a(8) =68a(9) =90a(10) =101a(11) =124a(12) =163a(13) =188a(14) =215a(15) =253a(16) =322a(17) =358a(18) =455a(19) =486a(20) =527a(21) =631a(22) =702a(23) =780a(24) =838a(25) =920a(26) =1030a(27) =1062a(28) =1197a(29) =1289

External references