Expansion of (A(x)^2-A(x^2))/2 where A(x) = A001006(x).

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =14a(5) =38a(6) =96a(7) =256a(8) =672a(9) =1805a(10) =4846a(11) =13162a(12) =35874a(13) =98469a(14) =271384a(15) =751656a(16) =2089640a(17) =5831451a(18) =16325950a(19) =45847770a(20) =129106738a(21) =364498596a(22) =1031480792a(23) =2925337352a(24) =8313200232a(25) =23668977163a(26) =67507731786a(27) =192859753310a(28) =551821286374