Triangle of numbers defined by Knuth.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =3a(5) =3a(6) =27a(7) =19a(8) =20a(9) =20a(10) =256a(11) =175a(12) =191a(13) =190a(14) =190a(15) =3125a(16) =2101a(17) =2344a(18) =2312a(19) =2313a(20) =2313a(21) =46656a(22) =31031a(23) =35127a(24) =34398a(25) =34462a(26) =34461a(27) =34461a(28) =823543a(29) =543607