Number of nondecreasing -2..2 vectors of length n whose dot product with some nonincreasing -2..2 vector equals n.

A226393

Number of nondecreasing -2..2 vectors of length n whose dot product with some nonincreasing -2..2 vector equals n.

Terms

    a(0) =2a(1) =12a(2) =12a(3) =48a(4) =38a(5) =128a(6) =92a(7) =282a(8) =182a(9) =540a(10) =322a(11) =948a(12) =540a(13) =1546a(14) =836a(15) =2394a(16) =1244a(17) =3544a(18) =1790a(19) =5070a(20) =2488a(21) =7036a(22) =3366a(23) =9530a(24) =4478a(25) =12626a(26) =5818a(27) =16428a(28) =7446a(29) =21022

External references