First member of a pair of numbers occurring in the definition of 2-happy couples.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =2a(6) =7a(7) =1a(8) =5a(9) =1a(10) =7a(11) =1a(12) =2a(13) =1a(14) =23a(15) =1a(16) =7a(17) =99a(18) =1a(19) =4a(20) =5a(21) =43a(22) =1a(23) =1a(24) =9a(25) =51a(26) =3a(27) =1a(28) =1a(29) =1