Number of n X 1 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4.

A239333

Number of n X 1 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4.

Terms

    a(0) =2a(1) =5a(2) =12a(3) =28a(4) =66a(5) =156a(6) =368a(7) =868a(8) =2048a(9) =4832a(10) =11400a(11) =26896a(12) =63456a(13) =149712a(14) =353216a(15) =833344a(16) =1966112a(17) =4638656a(18) =10944000a(19) =25820224a(20) =60917760a(21) =143723520a(22) =339087488a(23) =800010496a(24) =1887468032a(25) =4453111040a(26) =10506243072a(27) =24787422208a(28) =58481066496

External references