Number of chiral pairs of rows of length 5 using up to n colors.

Terms

a(0) =0a(1) =0a(2) =12a(3) =108a(4) =480a(5) =1500a(6) =3780a(7) =8232a(8) =16128a(9) =29160a(10) =49500a(11) =79860a(12) =123552a(13) =184548a(14) =267540a(15) =378000a(16) =522240a(17) =707472a(18) =941868a(19) =1234620a(20) =1596000a(21) =2037420a(22) =2571492a(23) =3212088a(24) =3974400a(25) =4875000a(26) =5931900a(27) =7164612a(28) =8594208a(29) =10243380