Diagonal sums of number triangle A120108.

Terms

a(0) =1a(1) =2a(2) =7a(3) =15a(4) =67a(5) =92a(6) =461a(7) =1065a(8) =3016a(9) =3956a(10) =29478a(11) =42231a(12) =379107a(13) =547556a(14) =603421a(15) =991923a(16) =12709228a(17) =18540622a(18) =241033695a(19) =352271227a(20) =389226278a(21) =407797820a(22) =5532937710a(23) =8097345425a(24) =30368363481a(25) =41503874738a(26) =98701094676a(27) =127342427241