Number of partitions of 2^n into at most three parts.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =30a(5) =102a(6) =374a(7) =1430a(8) =5590a(9) =22102a(10) =87894a(11) =350550a(12) =1400150a(13) =5596502a(14) =22377814a(15) =89494870a(16) =357946710a(17) =1431721302a(18) =5726754134a(19) =22906754390a(20) =91626493270a(21) =366504924502