Number of 3 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A281471
Number of 3 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =4a(1) =25a(2) =24a(3) =39a(4) =57a(5) =87a(6) =145a(7) =241a(8) =397a(9) =669a(10) =1133a(11) =1909a(12) =3229a(13) =5477a(14) =9277a(15) =15717a(16) =26653a(17) =45189a(18) =76605a(19) =129893a(20) =220253a(21) =373445a(22) =633213a(23) =1073701a(24) =1820573a(25) =3086981a(26) =5234365a(27) =8875493a(28) =15049437a(29) =25518149
External references
- oeis: A281471