Number of length n+3 0..4 arrays with no pair in any consecutive four terms totalling exactly 4.

A246475

Number of length n+3 0..4 arrays with no pair in any consecutive four terms totalling exactly 4.

Terms

    a(0) =172a(1) =484a(2) =1376a(3) =3904a(4) =11020a(5) =31104a(6) =87888a(7) =248568a(8) =702724a(9) =1985932a(10) =5612156a(11) =15862556a(12) =44837136a(13) =126731180a(14) =358188232a(15) =1012377900a(16) =2861418780a(17) =8087637712a(18) =22859103016a(19) =64609341900a(20) =182613147216a(21) =516142417472

External references