Triangle read by rows: entries on or below the main diagonal in A245558.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =2a(8) =5a(9) =8a(10) =1a(11) =3a(12) =7a(13) =14a(14) =25a(15) =1a(16) =3a(17) =9a(18) =20a(19) =42a(20) =75a(21) =1a(22) =4a(23) =12a(24) =30a(25) =66a(26) =132a(27) =245a(28) =1a(29) =4