Pascal's triangle read by rows: C(n,k) = binomial(n,k) = n!/(k!*(n-k)!), 0 <= k <= n.

Terms

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