Number of nX4 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
A280229
Number of nX4 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =8a(2) =16a(3) =48a(4) =116a(5) =288a(6) =678a(7) =1600a(8) =3766a(9) =8704a(10) =20040a(11) =45904a(12) =104540a(13) =237268a(14) =536526a(15) =1209480a(16) =2719500a(17) =6099968a(18) =13653798a(19) =30504064a(20) =68032030a(21) =151493220a(22) =336863254a(23) =748075672a(24) =1659257392a(25) =3676182044a(26) =8136355808a(27) =17990500384a(28) =39743338382
External references
- oeis: A280229