Take a <= b such that f(a)+f(b)=concatenation of a and b, where f(k)=k(k+3)/2 (A000096). Sequence gives values of a.

A099148

Take a <= b such that f(a)+f(b)=concatenation of a and b, where f(k)=k(k+3)/2 (A000096). Sequence gives values of a.

Terms

    a(0) =2a(1) =3a(2) =8a(3) =9a(4) =14a(5) =15a(6) =20a(7) =39a(8) =77a(9) =98a(10) =99a(11) =138a(12) =158a(13) =164a(14) =177a(15) =200a(16) =399a(17) =492a(18) =614a(19) =998a(20) =999a(21) =1065a(22) =1383a(23) =1505a(24) =1598a(25) =1797a(26) =1859a(27) =1920a(28) =2000a(29) =2655

External references