Array T(n, k) = k^(n-1) + (k-1)*cos(n*Pi/2), read by antidiagonals.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =1a(5) =1a(6) =9a(7) =9a(8) =1a(9) =1a(10) =16a(11) =29a(12) =16a(13) =1a(14) =1a(15) =31a(16) =81a(17) =67a(18) =25a(19) =1a(20) =1a(21) =64a(22) =241a(23) =256a(24) =129a(25) =36a(26) =1a(27) =1a(28) =129a(29) =729