Fourth row of Pascal-(1,2,1) array A081577.

Terms

a(0) =1a(1) =13a(2) =79a(3) =307a(4) =886a(5) =2086a(6) =4258a(7) =7834a(8) =13327a(9) =21331a(10) =32521a(11) =47653a(12) =67564a(13) =93172a(14) =125476a(15) =165556a(16) =214573a(17) =273769a(18) =344467a(19) =428071a(20) =526066a(21) =640018a(22) =771574a(23) =922462a(24) =1094491a(25) =1289551a(26) =1509613a(27) =1756729a(28) =2033032a(29) =2340736