Number of configurations of a variant of the 3-dimensional 3 X 3 X 3 sliding cube puzzle that require a minimum of n moves to be reached, starting with the empty space at one of the enclosing cube corners.

A090577

Number of configurations of a variant of the 3-dimensional 3 X 3 X 3 sliding cube puzzle that require a minimum of n moves to be reached, starting with the empty space at one of the enclosing cube corners.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =24a(4) =72a(5) =174a(6) =519a(7) =1284a(8) =3813a(9) =9300a(10) =27462a(11) =66666a(12) =195674a(13) =470886a(14) =1372946a(15) =3280224a(16) =9495005a(17) =22487511a(18) =64615934a(19) =151714911

External references