Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
A240371
Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =3a(1) =11a(2) =21a(3) =67a(4) =155a(5) =353a(6) =998a(7) =2256a(8) =5639a(9) =14624a(10) =34169a(11) =87040a(12) =216484a(13) =522354a(14) =1320708a(15) =3242252a(16) =7968236a(17) =19928605a(18) =48905783a(19) =121065218a(20) =300575628a(21) =739878493a(22) =1834210821a(23) =4538220894a(24) =11200994822a(25) =27751051195a(26) =68588966317a(27) =169541251841
External references
- oeis: A240371