Number of nX2 0..1 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.

A203632

Number of nX2 0..1 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.

Terms

    a(0) =4a(1) =4a(2) =6a(3) =6a(4) =26a(5) =90a(6) =222a(7) =674a(8) =2158a(9) =6546a(10) =20382a(11) =63922a(12) =200946a(13) =639554a(14) =2037050a(15) =6507122a(16) =20923918a(17) =67445362a(18) =217924638a(19) =706488874a(20) =2295658074a(21) =7475460546a(22) =24394962306a(23) =79753388458a(24) =261182132074a(25) =856719190626

External references