Diagonal sums of number triangle A120258.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =24a(6) =92a(7) =432a(8) =2740a(9) =23822a(10) =264185a(11) =3545166a(12) =59474514a(13) =1343942004a(14) =41179884383