Number of nondecreasing -n..n vectors of length 3 whose dot product with some lexicographically greater than or equal to nondecreasing -n..n vector equals 3.

A226424

Number of nondecreasing -n..n vectors of length 3 whose dot product with some lexicographically greater than or equal to nondecreasing -n..n vector equals 3.

Terms

    a(0) =4a(1) =20a(2) =61a(3) =104a(4) =186a(5) =275a(6) =431a(7) =585a(8) =848a(9) =1080a(10) =1470a(11) =1822a(12) =2361a(13) =2827a(14) =3543a(15) =4161a(16) =5091a(17) =5878a(18) =7061a(19) =7997a(20) =9430a(21) =10599a(22) =12324a(23) =13755a(24) =15718a(25) =17354a(26) =19743a(27) =21634a(28) =24383a(29) =26528

External references