Number of partitions of 4 copies of n into distinct parts.

Terms

a(0) =1a(1) =1a(2) =5a(3) =7a(4) =20a(5) =31a(6) =75a(7) =118a(8) =266a(9) =401a(10) =841a(11) =1345a(12) =2581a(13) =4023a(14) =7758a(15) =11932a(16) =21543a(17) =33941a(18) =59099a(19) =91816a(20) =159059a(21) =242955a(22) =407523a(23) =634827a(24) =1032202a(25) =1576276a(26) =2572429a(27) =3888631a(28) =6177754a(29) =9400070