Triangle: A060187 with interspersed zeros.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =6a(7) =0a(8) =1a(9) =1a(10) =0a(11) =23a(12) =0a(13) =23a(14) =0a(15) =1a(16) =1a(17) =0a(18) =76a(19) =0a(20) =230a(21) =0a(22) =76a(23) =0a(24) =1a(25) =1a(26) =0a(27) =237a(28) =0a(29) =1682