Number of n X 1 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, modulo 4.

A239812

Number of n X 1 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, modulo 4.

Terms

    a(0) =2a(1) =5a(2) =11a(3) =25a(4) =57a(5) =129a(6) =293a(7) =665a(8) =1509a(9) =3425a(10) =7773a(11) =17641a(12) =40037a(13) =90865a(14) =206221a(15) =468025a(16) =1062197a(17) =2410689a(18) =5471133a(19) =12416905a(20) =28180549a(21) =63956625a(22) =145151533a(23) =329425881a(24) =747642197a(25) =1696797025a(26) =3850933181a(27) =8739811625a(28) =19835272037a(29) =45016761649

External references