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A260291 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001 1
966, 1524, 3764, 7146, 10952, 29166, 62980, 101512, 225924, 560690, 1001440, 1911188, 4763260, 9721182, 17438056, 40009846, 89915636, 165964636, 343452844, 797625118, 1580513144, 3066061396, 6929750012, 14700161924, 28262011124 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A260294
LINKS
FORMULA
Empirical: a(n) = 8*a(n-3) +15*a(n-4) -21*a(n-6) -54*a(n-7) -96*a(n-8) +24*a(n-9) +110*a(n-10) +58*a(n-11) +363*a(n-12) -140*a(n-13) -80*a(n-14) +476*a(n-15) -862*a(n-16) +94*a(n-17) -536*a(n-18) -2602*a(n-19) +2319*a(n-20) -730*a(n-21) +2435*a(n-22) +5486*a(n-23) -4094*a(n-24) +4198*a(n-25) -4483*a(n-26) -6568*a(n-27) +5241*a(n-28) -12170*a(n-29) +5903*a(n-30) +1052*a(n-31) -5061*a(n-32) +19588*a(n-33) -11216*a(n-34) +9966*a(n-35) +283*a(n-36) -14948*a(n-37) +14249*a(n-38) -12458*a(n-39) +4592*a(n-40) +8246*a(n-41) -9693*a(n-42) +7496*a(n-43) -4542*a(n-44) -2962*a(n-45) +10795*a(n-46) -8100*a(n-47) +6583*a(n-48) +3686*a(n-49) -10166*a(n-50) +5138*a(n-51) -3253*a(n-52) -3056*a(n-53) +2290*a(n-54) -2556*a(n-55) -480*a(n-56) +230*a(n-57) +20*a(n-58) +1106*a(n-59) +1231*a(n-60) +328*a(n-61) +51*a(n-62) -292*a(n-63) -468*a(n-64) -78*a(n-65) -37*a(n-66) +48*a(n-67) +68*a(n-68) +4*a(n-69) +4*a(n-70) -4*a(n-71) -3*a(n-72) for n>78
EXAMPLE
Some solutions for n=4
..0..1..0..0..0..0..1....1..0..0..0..0..0..1....0..0..0..0..0..1..0
..0..0..0..0..1..1..0....0..0..1..1..0..0..1....0..0..0..0..0..1..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..1..0..0..0..0
..1..1..0..0..0..0..0....0..0..0..0..0..0..0....0..0..1..0..0..0..0
..0..0..0..0..1..1..0....0..1..1..0..0..1..1....0..0..0..0..0..1..1
..0..0..0..0..0..0..1....0..0..0..0..0..0..1....0..0..0..0..0..0..0
CROSSREFS
Sequence in context: A345549 A345802 A014363 * A251232 A202049 A246477
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 22 2015
STATUS
approved

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Last modified July 14 05:06 EDT 2024. Contains 374291 sequences. (Running on oeis4.)