A270579 The number of sets of parallel planes into which the planes defined in A270578 fall.

13, 145, 1237, 4813, 19225, 42901, 119725, 233065, 475609

Offset

2,1

Links

Table of n, a(n) for n=2..10.

Example

The 20 planes defined by the points of the 2 X 2 X 2 grid fall into 13 families of parallel planes: 3 parallel to the faces, 4 perpendicular to the space diagonals and 6 which are the planes defined by an edge and its opposite edge. So a(2)=13.

Crossrefs

Cf. A222267, A270578.

Sequence in context: A065411 A354466 A038492 * A297223 A199023 A152585

Adjacent sequences: A270576 A270577 A270578 * A270580 A270581 A270582

Keyword

nonn

Author

Clive Tooth, Mar 19 2016

Status

approved