Irregular triangle read by rows: T(n,k) is the number of compositions of 2^n into k powers of 2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =1a(7) =1a(8) =1a(9) =3a(10) =13a(11) =15a(12) =15a(13) =7a(14) =1a(15) =1a(16) =1a(17) =3a(18) =13a(19) =75a(20) =165a(21) =357a(22) =645a(23) =927a(24) =1095a(25) =957a(26) =627a(27) =299a(28) =91a(29) =15