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A208412 Number of 5Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1
51, 43947, 42012698, 40595679634, 39216100214432, 37884515848419250, 36598079445605633928, 35355330691346872093058, 34154781271350993450819306, 32994998532336627831187653984, 31874598155583932774268114331038 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A208408

LINKS

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

FORMULA

Empirical: a(n) = 846*a(n-1) +113055*a(n-2) +2929874*a(n-3) -109060673*a(n-4) -3622824692*a(n-5) +65097142029*a(n-6) +1105024278376*a(n-7) -27292434557458*a(n-8) +142062088508752*a(n-9) +377948844669748*a(n-10) -4808916389539500*a(n-11) +4645157287758163*a(n-12) +52333669611524778*a(n-13) -120575382680010711*a(n-14) -210993332876225106*a(n-15) +842794866719196543*a(n-16) +23751649411434324*a(n-17) -2346267769038080739*a(n-18) +1537588828184004828*a(n-19) +2261528701157029077*a(n-20) -2074597977196235322*a(n-21) -1044955823075183619*a(n-22) +1037909226733865982*a(n-23) +266013779180313879*a(n-24) -226004933703781188*a(n-25) -35288827553849769*a(n-26) +20872926611932608*a(n-27) +1881175972889916*a(n-28) -620089737873840*a(n-29) for n>32

EXAMPLE

Some solutions for n=4

..0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

..1..0..2..1....0..1..1..2....0..1..0..1....0..1..1..1....0..1..0..1

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

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

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

CROSSREFS

Sequence in context: A255832 A208198 A208405 * A198904 A238567 A198251

Adjacent sequences:  A208409 A208410 A208411 * A208413 A208414 A208415

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2012

STATUS

approved

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Last modified September 18 17:02 EDT 2020. Contains 337170 sequences. (Running on oeis4.)