Number of length n+3 0..2 arrays with no disjoint pairs in any consecutive four terms having the same sum.

A247720

Number of length n+3 0..2 arrays with no disjoint pairs in any consecutive four terms having the same sum.

Terms

    a(0) =48a(1) =90a(2) =172a(3) =334a(4) =656a(5) =1300a(6) =2584a(7) =5148a(8) =10272a(9) =20520a(10) =41008a(11) =81976a(12) =163904a(13) =327760a(14) =655456a(15) =1310832a(16) =2621568a(17) =5243040a(18) =10485952a(19) =20971744a(20) =41943296a(21) =83886400a(22) =167772544a(23) =335544768a(24) =671089152a(25) =1342177920a(26) =2684355328a(27) =5368710016

External references