A181242 Number of nX7 binary matrices with no 2X2 circuit having pattern 0101 in any orientation

128, 8042, 546410, 36806846, 2481942354, 167341334542, 11282914491066, 760744103230314, 51292751478532550, 3458385370907981754, 233179719922207016438, 15722013576638868003178, 1060048065098345660585310

Offset

1,1

Comments

Column 7 of A181245

Links

R. H. Hardin, Table of n, a(n) for n=1..200

Formula

Empirical: a(n)=77*a(n-1)-429*a(n-2)-16791*a(n-3)+132938*a(n-4)+1140609*a(n-5)-11250708*a(n-6)-21101443*a(n-7)+356560316*a(n-8)-276630106*a(n-9)-3595865197*a(n-10)+5253257444*a(n-11)+16399879057*a(n-12)-30419637636*a(n-13)-37486637674*a(n-14)+87632998667*a(n-15)+40083109062*a(n-16)-140235056122*a(n-17)-7589163210*a(n-18)+128111780723*a(n-19)-23221600421*a(n-20)-65939015129*a(n-21)+21868944788*a(n-22)+18307048178*a(n-23)-8259596531*a(n-24)-2431120428*a(n-25)+1497147381*a(n-26)+85285300*a(n-27)-123174410*a(n-28)+8581030*a(n-29)+3300116*a(n-30)-512304*a(n-31)+18304*a(n-32)

Crossrefs

Sequence in context: A013700 A232995 A283281 * A035817 A297373 A283697

Adjacent sequences: A181239 A181240 A181241 * A181243 A181244 A181245

Keyword

nonn

Author

R. H. Hardin Oct 10 2010

Status

approved