Number of partitions of n with up to four distinct kinds of 1.

Terms

a(0) =1a(1) =4a(2) =7a(3) =9a(4) =13a(5) =20a(6) =29a(7) =41a(8) =57a(9) =78a(10) =106a(11) =142a(12) =188a(13) =248a(14) =324a(15) =419a(16) =540a(17) =692a(18) =880a(19) =1114a(20) =1404a(21) =1761a(22) =2200a(23) =2736a(24) =3389a(25) =4186a(26) =5152a(27) =6317a(28) =7724a(29) =9418