Number of n X 7 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280553
Number of n X 7 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =13a(1) =400a(2) =1316a(3) =3182a(4) =6386a(5) =11697a(6) =20334a(7) =34360a(8) =57389a(9) =95548a(10) =159360a(11) =266756a(12) =448302a(13) =755986a(14) =1278112a(15) =2164458a(16) =3668734a(17) =6220179a(18) =10544150a(19) =17865068a(20) =30247639a(21) =51170104a(22) =86486508a(23) =146040766a(24) =246372038a(25) =415246118a(26) =699240242
External references
- oeis: A280553