A symmetrical powers triangle sequence: t(n,m) = (m^(n - m) + (n - m)^m).

Terms

a(0) =2a(1) =3a(2) =3a(3) =4a(4) =8a(5) =4a(6) =5a(7) =17a(8) =17a(9) =5a(10) =6a(11) =32a(12) =54a(13) =32a(14) =6a(15) =7a(16) =57a(17) =145a(18) =145a(19) =57a(20) =7a(21) =8a(22) =100a(23) =368a(24) =512a(25) =368a(26) =100a(27) =8a(28) =9a(29) =177