Number of nX2 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4.
A240418
Number of nX2 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =7a(1) =35a(2) =147a(3) =553a(4) =2045a(5) =7439a(6) =27099a(7) =98193a(8) =356367a(9) =1290555a(10) =4678201a(11) =16941465a(12) =61383669a(13) =222305205a(14) =805315687a(15) =2916643869a(16) =10564820487a(17) =38264178015a(18) =138597036507a(19) =501986131233
External references
- oeis: A240418