a(n) = (n+1)*binomial(n+6,6).

Terms

a(0) =1a(1) =14a(2) =84a(3) =336a(4) =1050a(5) =2772a(6) =6468a(7) =13728a(8) =27027a(9) =50050a(10) =88088a(11) =148512a(12) =241332a(13) =379848a(14) =581400a(15) =868224a(16) =1268421a(17) =1817046a(18) =2557324a(19) =3542000a(20) =4834830a(21) =6512220a(22) =8665020a(23) =11400480a(24) =14844375a(25) =19143306a(26) =24467184a(27) =31011904a(28) =39002216a(29) =48694800