T(n,k)=Number of second differences of arrays of length n+2 of numbers in 0..k.

Terms

a(0) =5a(1) =9a(2) =15a(3) =13a(4) =49a(5) =31a(6) =17a(7) =103a(8) =199a(9) =63a(10) =21a(11) =177a(12) =625a(13) =665a(14) =127a(15) =25a(16) =271a(17) =1429a(18) =3151a(19) =2059a(20) =255a(21) =29a(22) =385a(23) =2731a(24) =9705a(25) =14053a(26) =6305a(27) =511a(28) =33a(29) =519