Shallow diagonal sums of A211226.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =4a(6) =5a(7) =8a(8) =8a(9) =15a(10) =13a(11) =28a(12) =21a(13) =51a(14) =34a(15) =92a(16) =55a(17) =164a(18) =89a(19) =290a(20) =144a(21) =509a(22) =233a(23) =888a(24) =377a(25) =1541a(26) =610a(27) =2662a(28) =987a(29) =4580