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 A240003 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4 1
 28, 256, 1372, 6527, 27415, 104291, 363859, 1173141, 3539402, 10055917, 27072084, 69433880, 170442542, 402042194, 914489241, 2012051851, 4293710454, 8908363984, 18007433696, 35530979384, 68546844725, 129490989279, 239852605993 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A240000 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1/30411275102208000)*n^19 + (1/914624815104000)*n^18 + (397/2134124568576000)*n^17 + (37/62768369664000)*n^16 + (2567/6276836966400)*n^15 - (77899/8966909952000)*n^14 + (121042813/188305108992000)*n^13 - (5389171/258660864000)*n^12 + (469998043/603542016000)*n^11 - (20022197893/877879296000)*n^10 + (5869313250161/9656672256000)*n^9 - (9505177279259/689762304000)*n^8 + (12579369755410273/47076277248000)*n^7 - (3647143231803217/840647808000)*n^6 + (50430900400493621/871782912000)*n^5 - (804068701944948239/1307674368000)*n^4 + (64298607619642973/12864852000)*n^3 - (25675604169133123/882161280)*n^2 + (25119199779142691/232792560)*n - 191027452 for n>20 EXAMPLE Some solutions for n=5 ..0..0..0..3..3....0..3..3..0..0....0..0..0..0..0....0..0..0..0..3 ..0..0..3..3..2....0..0..3..1..0....0..0..0..3..3....3..3..0..0..0 ..3..3..0..2..2....0..3..3..1..3....3..3..0..2..2....2..2..3..3..0 ..0..2..2..0..3....0..2..1..2..3....3..2..1..2..2....2..1..3..2..2 CROSSREFS Sequence in context: A042522 A025517 A222267 * A225242 A189606 A336294 Adjacent sequences:  A240000 A240001 A240002 * A240004 A240005 A240006 KEYWORD nonn AUTHOR R. H. Hardin, Mar 30 2014 STATUS approved

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Last modified September 20 01:23 EDT 2020. Contains 337235 sequences. (Running on oeis4.)