A375865 Number of shapes of a Rubik's Snake with n wedges.

1, 4, 16, 64, 241, 920, 3384, 12585, 46471, 172226, 633138, 2333757, 8561679, 31462176, 115247629, 422677188, 1546186675, 5661378449, 20689242550, 75663420126, 276279455583, 1009416896015, 3683274847187, 13446591920995, 49037278586475, 178904588083788, 652111697384508, 2377810831870022

Offset

1,2

Links

Table of n, a(n) for n=1..28.

Peter Aylett, Rubik's Snake Combinations.

Dmytro Fedoriaka, Counting Rubik's Snake Shapes.

Wikipedia, Rubik's Snake.

Crossrefs

Sequence in context: A228735 A289694 A232425 * A180239 A006811 A269685

Adjacent sequences: A375862 A375863 A375864 * A375866 A375867 A375868

Keyword

nonn

Author

Dmytro Fedoriaka, Aug 31 2024

Status

approved