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A265926 Number of nX6 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique. 1
4616, 223788, 1042020, 4697060, 22093736, 112139348, 579039920, 3147755448, 16695518060, 93517706688, 501203927348, 2859121829240, 15405235373552, 89142152698780, 481953256911808, 2824461163398576, 15308600049212112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A265928.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 12*a(n-1) +103*a(n-2) -1722*a(n-3) -2939*a(n-4) +106767*a(n-5) -63388*a(n-6) -3818080*a(n-7) +6821368*a(n-8) +88753235*a(n-9) -228687359*a(n-10) -1429736764*a(n-11) +4584661386*a(n-12) +16576168634*a(n-13) -62836934620*a(n-14) -141587501176*a(n-15) +622701665207*a(n-16) +905061966122*a(n-17) -4591839808287*a(n-18) -4391201427194*a(n-19) +25582794671753*a(n-20) +16522425949387*a(n-21) -108415973939476*a(n-22) -50233703208584*a(n-23) +349511463268834*a(n-24) +131466723678583*a(n-25) -851431283928441*a(n-26) -310212728772512*a(n-27) +1542982242611112*a(n-28) +640450098092716*a(n-29) -2018069409667076*a(n-30) -1053850634770704*a(n-31) +1795151718879024*a(n-32) +1248961532534208*a(n-33) -946555845247296*a(n-34) -962641790731008*a(n-35) +163939035103488*a(n-36) +412969818064896*a(n-37) +90641044776960*a(n-38) -61602295136256*a(n-39) -38676101087232*a(n-40) -8216950210560*a(n-41) -632073093120*a(n-42) for n>50

EXAMPLE

Some solutions for n=1

..4..4..3..3..0..0....4..4..0..1..3..4....2..1..3..0..2..2....3..1..1..4..3..1

CROSSREFS

Cf. A265928.

Sequence in context: A263115 A210350 A265971 * A260054 A253115 A189983

Adjacent sequences:  A265923 A265924 A265925 * A265927 A265928 A265929

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2015

STATUS

approved

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Last modified May 25 01:00 EDT 2022. Contains 354047 sequences. (Running on oeis4.)