Seventh diagonal of triangle A064094.

Terms

a(0) =1a(1) =132a(2) =2307a(3) =14506a(4) =55797a(5) =161376a(6) =387607a(7) =817062a(8) =1563561a(9) =2777212a(10) =4649451a(11) =7418082a(12) =11372317a(13) =16857816a(14) =24281727a(15) =34117726a(16) =46911057a(17) =63283572a(18) =83938771a(19) =109666842a(20) =141349701a(21) =179966032a(22) =226596327a(23) =282427926a(24) =348760057a(25) =427008876a(26) =518712507a(27) =625536082a(28) =749276781