A265926 Number of nX6 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.

4616, 223788, 1042020, 4697060, 22093736, 112139348, 579039920, 3147755448, 16695518060, 93517706688, 501203927348, 2859121829240, 15405235373552, 89142152698780, 481953256911808, 2824461163398576, 15308600049212112

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 * A365483 A260054 A253115

Adjacent sequences: A265923 A265924 A265925 * A265927 A265928 A265929

Keyword

nonn

Author

R. H. Hardin, Dec 18 2015

Status

approved