Consider 3 X 3 X 3 Rubik cube, but only allow the <U, R> group to act; sequence gives number of positions that are exactly n moves from the start.
A080628
Consider 3 X 3 X 3 Rubik cube, but only allow the <U, R> group to act; sequence gives number of positions that are exactly n moves from the start.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =24a(4) =58a(5) =140a(6) =338a(7) =816a(8) =1970a(9) =4756a(10) =11448a(11) =27448a(12) =65260a(13) =154192a(14) =360692a(15) =827540a(16) =1851345a(17) =3968840a(18) =7891990a(19) =13659821a(20) =18471682a(21) =16586822a(22) =8039455a(23) =1511110a(24) =47351a(25) =87
External references
- oeis: A080628