Let M be the matrix defined in A111490. Sequence gives M(2,1)-M(1,2), M(2,1)+M(3,1)+M(3,2)-M(1,2)-M(1,3)-M(2,3), etc.

A123329

Let M be the matrix defined in A111490. Sequence gives M(2,1)-M(1,2), M(2,1)+M(3,1)+M(3,2)-M(1,2)-M(1,3)-M(2,3), etc.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =8a(4) =14a(5) =26a(6) =39a(7) =59a(8) =83a(9) =115a(10) =148a(11) =197a(12) =247a(13) =307a(14) =376a(15) =460a(16) =545a(17) =651a(18) =758a(19) =887a(20) =1027a(21) =1181a(22) =1336a(23) =1527a(24) =1724a(25) =1937a(26) =2163a(27) =2417a(28) =2672a(29) =2969

External references