a(n)=T(n,1), array T as in A049735.

Terms

a(0) =5a(1) =9a(2) =21a(3) =37a(4) =57a(5) =89a(6) =121a(7) =161a(8) =213a(9) =261a(10) =325a(11) =385a(12) =457a(13) =545a(14) =621a(15) =717a(16) =805a(17) =917a(18) =1033a(19) =1137a(20) =1265a(21) =1389a(22) =1533a(23) =1669a(24) =1801a(25) =1969a(26) =2129a(27) =2305a(28) =2469a(29) =2637