Number of n X 2 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,1) and new values introduced in order 0..2.
A275395
Number of n X 2 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,1) and new values introduced in order 0..2.
Terms
- a(0) =2a(1) =9a(2) =16a(3) =31a(4) =63a(5) =129a(6) =260a(7) =534a(8) =1083a(9) =2210a(10) =4496a(11) =9157a(12) =18653a(13) =37980a(14) =77372a(15) =157551a(16) =320905a(17) =653525a(18) =1331010a(19) =2710764a(20) =5520787a(21) =11243865a(22) =22899407a(23) =46637722a(24) =94983335a(25) =193445757a(26) =393976458a(27) =802382692a(28) =1634153628a(29) =3328158969
External references
- oeis: A275395