a(n) = largest term in row n of array in A272644.

Terms

a(0) =1a(1) =1a(2) =5a(3) =13a(4) =73a(5) =301a(6) =2069a(7) =11581a(8) =95401a(9) =673261a(10) =6487445a(11) =55213453a(12) =610093513a(13) =6077248381a(14) =75796724309a(15) =864806272861