Number of ways to partition 4*n into distinct positive integers.

Terms

a(0) =1a(1) =2a(2) =6a(3) =15a(4) =32a(5) =64a(6) =122a(7) =222a(8) =390a(9) =668a(10) =1113a(11) =1816a(12) =2910a(13) =4582a(14) =7108a(15) =10880a(16) =16444a(17) =24576a(18) =36352a(19) =53250a(20) =77312a(21) =111322a(22) =159046a(23) =225585a(24) =317788a(25) =444793a(26) =618784a(27) =855906a(28) =1177438a(29) =1611388