Allan Wechsler's "J determinant" sequence.

Terms

a(0) =1a(1) =5a(2) =4a(3) =9a(4) =16a(5) =11a(6) =19a(7) =11a(8) =20a(9) =31a(10) =19a(11) =31a(12) =45a(13) =29a(14) =44a(15) =25a(16) =41a(17) =59a(18) =36a(19) =55a(20) =29a(21) =49a(22) =71a(23) =41a(24) =64a(25) =89a(26) =55a(27) =81a(28) =44a(29) =71