T(n,n-2), where T is the array in A026374.

Terms

a(0) =1a(1) =4a(2) =11a(3) =17a(4) =30a(5) =39a(6) =58a(7) =70a(8) =95a(9) =110a(10) =141a(11) =159a(12) =196a(13) =217a(14) =260a(15) =284a(16) =333a(17) =360a(18) =415a(19) =445a(20) =506a(21) =539a(22) =606a(23) =642a(24) =715a(25) =754a(26) =833a(27) =875a(28) =960a(29) =1005