Number of partitions of 2*n + 1 into parts of two kinds.

Terms

a(0) =2a(1) =10a(2) =36a(3) =110a(4) =300a(5) =752a(6) =1770a(7) =3956a(8) =8470a(9) =17490a(10) =35002a(11) =68150a(12) =129512a(13) =240840a(14) =439190a(15) =786814a(16) =1386930a(17) =2408658a(18) =4126070a(19) =6978730a(20) =11664896a(21) =19283830a(22) =31551450a(23) =51124970a(24) =82088400a(25) =130673928a(26) =206327710a(27) =323275512a(28) =502810130