Triangular array T read by rows: T(n, k) = t(n, 2k), t given by A027960, 0 <= k <= n, n >= 0.

Terms

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