Pascal-(1,7,1) array.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =1a(6) =1a(7) =17a(8) =17a(9) =1a(10) =1a(11) =25a(12) =97a(13) =25a(14) =1a(15) =1a(16) =33a(17) =241a(18) =241a(19) =33a(20) =1a(21) =1a(22) =41a(23) =449a(24) =1161a(25) =449a(26) =41a(27) =1a(28) =1a(29) =49