Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
A240413
Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =5a(1) =10a(2) =32a(3) =80a(4) =162a(5) =493a(6) =1109a(7) =2656a(8) =7235a(9) =16492a(10) =41839a(11) =106203a(12) =251488a(13) =640167a(14) =1579481a(15) =3845121a(16) =9681356a(17) =23735901a(18) =58568055a(19) =145990039a(20) =358605440a(21) =888720845a(22) =2202562818a(23) =5427876319a(24) =13455220186a(25) =33269176662a(26) =82172839773a(27) =203518046217
External references
- oeis: A240413