Triangle read by rows, related to Pascal's triangle, starting with rows 1; 1,1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =2a(6) =3a(7) =7a(8) =7a(9) =3a(10) =5a(11) =15a(12) =21a(13) =15a(14) =5a(15) =8a(16) =30a(17) =53a(18) =53a(19) =30a(20) =8a(21) =13a(22) =58a(23) =124a(24) =157a(25) =124a(26) =58a(27) =13a(28) =21a(29) =109