Diagonal sums of A103462.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =9a(7) =16a(8) =31a(9) =69a(10) =168a(11) =447a(12) =1274a(13) =3862a(14) =12351a(15) =41472a(16) =145661a(17) =533745a(18) =2036158a(19) =8071795a(20) =33192800a(21) =141351726a(22) =622384741a(23) =2829417288a(24) =13263528363a(25) =64038928741a(26) =318121600708