T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A027157.

Terms

a(0) =1a(1) =2a(2) =6a(3) =10a(4) =39a(5) =61a(6) =180a(7) =300a(8) =1157a(9) =1823a(10) =5502a(11) =9282a(12) =35911a(13) =57101a(14) =174312a(15) =296536a(16) =1147657a(17) =1837307a(18) =5643506a(19) =9657582a(20) =37349067a(21) =60103305a(22) =185313180a(23) =318533124a(24) =1230555661a(25) =1988344759a(26) =6145979174a(27) =10601082970a(28) =40907870479