Numbers in order in which they appear in Pascal's triangle.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =5a(6) =10a(7) =15a(8) =20a(9) =7a(10) =21a(11) =35a(12) =8a(13) =28a(14) =56a(15) =70a(16) =9a(17) =36a(18) =84a(19) =126a(20) =45a(21) =120a(22) =210a(23) =252a(24) =11a(25) =55a(26) =165a(27) =330a(28) =462a(29) =12