Number of nX2 0..1 arrays with no element equal to more than four of its king-move neighbors and with new values introduced in order 0 sequentially upwards.
A281831
Number of nX2 0..1 arrays with no element equal to more than four of its king-move neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =8a(2) =31a(3) =121a(4) =472a(5) =1841a(6) =7181a(7) =28010a(8) =109255a(9) =426157a(10) =1662256a(11) =6483749a(12) =25290329a(13) =98646746a(14) =384778723a(15) =1500857065a(16) =5854200856a(17) =22834731209a(18) =89068510325a(19) =347418126314
External references
- oeis: A281831