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 b.

A099149

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 b.

Terms

    a(0) =5a(1) =6a(2) =8a(3) =8a(4) =6a(5) =5a(6) =59a(7) =78a(8) =384a(9) =98a(10) =98a(11) =506a(12) =78a(13) =1803a(14) =59a(15) =599a(16) =798a(17) =960a(18) =921a(19) =998a(20) =998a(21) =14555a(22) =921a(23) =860a(24) =798a(25) =599a(26) =506a(27) =384a(28) =5999a(29) =6785

External references