Diagonal sums of the number triangle A098505.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =5a(5) =6a(6) =10a(7) =9a(8) =19a(9) =22a(10) =65a(11) =88a(12) =114a(13) =187a(14) =395a(15) =376a(16) =888a(17) =520a(18) =2645a(19) =2017a(20) =3303a(21) =3590a(22) =8820a(23) =9408a(24) =5785a(25) =7792a(26) =24181a(27) =27047a(28) =74720a(29) =68731