The array in A059502 read by antidiagonals in 'up' direction.

Terms

a(0) =1a(1) =2a(2) =3a(3) =3a(4) =5a(5) =9a(6) =4a(7) =7a(8) =14a(9) =27a(10) =5a(11) =9a(12) =19a(13) =40a(14) =80a(15) =6a(16) =11a(17) =24a(18) =53a(19) =114a(20) =234a(21) =7a(22) =13a(23) =29a(24) =66a(25) =148a(26) =323a(27) =677a(28) =8a(29) =15