The odd edge of a primitive 3-simplex (0, b=A031173, c=A031174, d=A031175).

Terms

a(0) =117a(1) =275a(2) =693a(3) =85a(4) =231a(5) =1155a(6) =187a(7) =429a(8) =855a(9) =2475a(10) =2035a(11) =2295a(12) =6325a(13) =195a(14) =1155a(15) =1755a(16) =495a(17) =1575a(18) =9405a(19) =10725a(20) =2925a(21) =12075a(22) =4901a(23) =1881a(24) =11753a(25) =7579a(26) =8789a(27) =16929a(28) =19305a(29) =5643