Number of compositions of even natural numbers into 5 parts <= n.

Terms

a(0) =1a(1) =16a(2) =122a(3) =512a(4) =1563a(5) =3888a(6) =8404a(7) =16384a(8) =29525a(9) =50000a(10) =80526a(11) =124416a(12) =185647a(13) =268912a(14) =379688a(15) =524288a(16) =709929a(17) =944784a(18) =1238050a(19) =1600000a(20) =2042051a(21) =2576816a(22) =3218172a(23) =3981312a(24) =4882813a(25) =5940688