Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.
A240187
Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =1a(1) =5a(2) =12a(3) =27a(4) =73a(5) =154a(6) =358a(7) =872a(8) =1871a(9) =4438a(10) =10338a(11) =22880a(12) =54100a(13) =123711a(14) =279854a(15) =655190a(16) =1491102a(17) =3413413a(18) =7919449a(19) =18045604a(20) =41514375a(21) =95741087a(22) =218782546a(23) =503899032a(24) =1158409848a(25) =2653808377a(26) =6109601340a(27) =14027233372a(28) =32187863462
External references
- oeis: A240187