login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A118142 Numbers n such that a perfect n X n parity pattern exists. 1
4, 5, 9, 11, 16, 19, 23, 29, 30, 32, 33, 39, 47, 59, 61, 62, 64, 65, 67, 79, 84, 95, 101, 119, 123, 125, 126, 128, 129, 131, 135, 154, 159, 164, 169, 170, 185, 191, 203, 204, 239, 247, 251, 253, 254, 256, 257, 259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A118141 for definitions and references.

LINKS

Table of n, a(n) for n=1..48.

CROSSREFS

A subsequence of A117870.

Sequence in context: A162698 A166562 A031363 * A193584 A155149 A024821

Adjacent sequences:  A118139 A118140 A118141 * A118143 A118144 A118145

KEYWORD

nonn

AUTHOR

Don Knuth, May 11 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)