Number of n X 7 0..1 arrays with every element unequal to 0, 1 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A299594
Number of n X 7 0..1 arrays with every element unequal to 0, 1 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =26a(2) =65a(3) =250a(4) =541a(5) =1225a(6) =2583a(7) =5488a(8) =11899a(9) =25570a(10) =54750a(11) =117697a(12) =252985a(13) =543115a(14) =1166472a(15) =2505919a(16) =5382274a(17) =11560042a(18) =24830445a(19) =53333641a(20) =114554095a(21) =246050920a(22) =528494067a(23) =1135150426a(24) =2438187262a(25) =5236983073a(26) =11248510665a(27) =24160660963
External references
- oeis: A299594