Number of 5-cycles in the n-triangular graph.

Terms

a(0) =0a(1) =0a(2) =24a(3) =312a(4) =1584a(5) =5376a(6) =14448a(7) =33264a(8) =68544a(9) =129888a(10) =230472a(11) =387816a(12) =624624a(13) =969696a(14) =1458912a(15) =2136288a(16) =3055104a(17) =4279104a(18) =5883768a(19) =7957656a(20) =10603824a(21) =13941312a(22) =18106704a(23) =23255760a(24) =29565120a(25) =37234080a(26) =46486440a(27) =57572424a(28) =70770672a(29) =86390304