Number of partitions of n such that 4*(smallest part) = (number of parts).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =3a(7) =4a(8) =5a(9) =7a(10) =8a(11) =10a(12) =12a(13) =14a(14) =16a(15) =20a(16) =22a(17) =26a(18) =30a(19) =35a(20) =40a(21) =48a(22) =55a(23) =65a(24) =76a(25) =90a(26) =105a(27) =126a(28) =147a(29) =175