Difference row triangle of A117189.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =5a(6) =4a(7) =6a(8) =9a(9) =14a(10) =7a(11) =11a(12) =17a(13) =26a(14) =40a(15) =13a(16) =20a(17) =31a(18) =48a(19) =74a(20) =114a(21) =24a(22) =37a(23) =57a(24) =88a(25) =136a(26) =210a(27) =324a(28) =44a(29) =68