1/36 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last.
A184453
1/36 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last.
Terms
- a(0) =12879a(1) =16029a(2) =20706a(3) =28668a(4) =53350a(5) =116832a(6) =309042a(7) =1119528a(8) =4313386a(9) =16945248a(10) =77250850a(11) =344875848a(12) =1476839034a(13) =7104621264a(14) =33006043666a(15) =145119799128a(16) =712190401450
External references
- oeis: A184453