A225595 Conjectured square array T(n,k) read by antidiagonals related to the existence of rectangles of size n*k in the toothpick structure of A139250.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0

Offset

1

Comments

For more information see Brian's article in the Links section.

Links

Table of n, a(n) for n=1..45.

Brian Hayes, Joshua Trees and Toothpicks

Brian Hayes, The Toothpick Sequence - Bit-Player

Example

Array begins:
1,1,1,1,0,1,1,1,0,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,
1,1,1,1,1,1,
0,1,1,1,0,
1,1,1,1,
1,1,1,
1,1,
0

Crossrefs

Cf. A023758, A101082, A139250, A159786, A160124-A160126, A211008, A211012, A211016-A211019.

Sequence in context: A131364 A152066 A334946 * A228813 A122255 A122261

Adjacent sequences: A225592 A225593 A225594 * A225596 A225597 A225598

Keyword

nonn,tabl,more

Author

Omar E. Pol, May 13 2013

Extensions

Suggested by Brian Hayes, Feb 08 2013

Status

approved