(1,[99n+1]) Pascal Triangle.

Terms

a(0) =1a(1) =1a(2) =100a(3) =1a(4) =101a(5) =199a(6) =1a(7) =102a(8) =300a(9) =298a(10) =1a(11) =103a(12) =402a(13) =598a(14) =397a(15) =1a(16) =104a(17) =505a(18) =1000a(19) =995a(20) =496a(21) =1a(22) =105a(23) =609a(24) =1505a(25) =1995a(26) =1491a(27) =595a(28) =1a(29) =106