login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A259295
Number of (n+1)X(6+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0001 0101 or 0111
1
1114, 13774, 148296, 1729342, 19528726, 224879224, 2569298018, 29500968894, 338055313800, 3878896990174, 44483223452862, 510316949991536, 5853542348939354, 67149326597585790, 770274713475362632
OFFSET
1,1
COMMENTS
Column 6 of A259297
LINKS
FORMULA
Empirical: a(n) = 17*a(n-1) +68*a(n-2) -2331*a(n-3) +2715*a(n-4) +127282*a(n-5) -407543*a(n-6) -3552923*a(n-7) +16967238*a(n-8) +53329851*a(n-9) -373159393*a(n-10) -374852552*a(n-11) +5020944360*a(n-12) -530953324*a(n-13) -44088857196*a(n-14) +35340877520*a(n-15) +260439199152*a(n-16) -343900816832*a(n-17) -1042238954144*a(n-18) +1873164312128*a(n-19) +2773317482368*a(n-20) -6583718366464*a(n-21) -4584267066368*a(n-22) +15516200251392*a(n-23) +3621536735232*a(n-24) -24598780526592*a(n-25) +1537459224576*a(n-26) +25766309396480*a(n-27) -6673413963776*a(n-28) -17180213116928*a(n-29) +6712291491840*a(n-30) +6848728006656*a(n-31) -3277395591168*a(n-32) -1448477720576*a(n-33) +776315338752*a(n-34) +120259084288*a(n-35) -68719476736*a(n-36)
EXAMPLE
Some solutions for n=3
..0..1..0..0..0..0..1....0..1..0..0..1..1..0....0..1..0..1..0..1..0
..0..0..0..1..0..1..1....1..0..0..1..0..1..1....1..0..1..0..1..1..1
..0..1..0..0..0..0..1....0..1..0..0..0..0..1....0..1..0..1..1..0..1
..0..0..1..0..1..0..0....0..0..0..1..0..1..0....1..0..0..0..1..1..0
CROSSREFS
Sequence in context: A151951 A190017 A027622 * A260103 A258691 A221428
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 23 2015
STATUS
approved