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A251474 T(n,k) = Number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock summing to a prime. 7
458, 5896, 5896, 75962, 167554, 75962, 979132, 4789458, 4789458, 979132, 12620130, 137223466, 305835002, 137223466, 12620130, 162672044, 3932396176, 19627202794, 19627202794, 3932396176, 162672044, 2096768998, 112715450380, 1260430729632 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.......458.........5896..........75962............979132.............12620130
......5896.......167554........4789458.........137223466...........3932396176
.....75962......4789458......305835002.......19627202794........1260430729632
....979132....137223466....19627202794.....2830218950082......408635929747162
..12620130...3932396176..1260430729632...408635929747162...132738273844782290
.162672044.112715450380.80982143877530.59049118022243816.43169937494954605912
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 10].
k=2: [order 45].
EXAMPLE
Some solutions for n=2, k=4
..0..3..3..0..0....0..0..0..0..3....0..3..0..0..3....0..0..3..0..3
..0..2..5..3..2....0..2..3..0..4....0..0..2..0..2....3..2..0..0..0
..3..2..4..5..1....0..1..5..3..4....3..2..3..2..3....0..0..3..4..3
CROSSREFS
Sequence in context: A341186 A252407 A252408 * A251468 A098765 A286845
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 02 2014
STATUS
approved

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Last modified March 28 14:02 EDT 2024. Contains 371254 sequences. (Running on oeis4.)