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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A222573 T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 12
 1, 1, 2, 1, 1, 5, 4, 5, 5, 14, 5, 10, 11, 18, 41, 14, 25, 56, 120, 59, 122, 17, 128, 134, 435, 500, 200, 365, 70, 292, 1500, 3516, 4790, 5210, 820, 1094, 89, 1318, 3999, 25441, 30766, 50535, 20889, 3014, 3281, 326, 3640, 46250, 212957, 543064, 881766, 547563 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Table starts .....1......1.........1..........4...........5...........14...........17 .....2......1.........5.........10..........25..........128..........292 .....5......5........11.........56.........134.........1500.........3999 ....14.....18.......120........435........3516........25441.......212957 ....41.....59.......500.......4790.......30766.......543064......4102865 ...122....200......5210......50535......881766.....14120189....278335019 ...365....820.....20889.....547563.....9004283....406233879...7240361264 ..1094...3014....229894....5815939...287554360..12231597130.617491399888 ..3281..11364....913405...63130202..2996904309.379056994144 ..9842..42748..10427244..676152734.97314847813 .29525.164652..40896923.7328771224 .88574.627034.479942958 LINKS R. H. Hardin, Table of n, a(n) for n = 1..110 EXAMPLE Some solutions for n=3 k=4 ..0..0..0..0....0..1..1..1....0..0..0..0....0..0..1..1....0..0..1..1 ..0..0..0..0....2..1..1..1....0..0..0..0....1..1..1..1....0..0..1..1 ..1..2..0..0....2..1..1..1....1..0..0..1....1..1..1..1....0..0..1..1 CROSSREFS Column 1 is A007051(n-1) Row 1 is A222364 Sequence in context: A327483 A327884 A050145 * A222679 A058676 A147649 Adjacent sequences:  A222570 A222571 A222572 * A222574 A222575 A222576 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 25 2013 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.

Last modified November 30 19:02 EST 2021. Contains 349424 sequences. (Running on oeis4.)