Number of partitions p of n that contain a proper partition of the number of parts of p.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =4a(7) =8a(8) =12a(9) =19a(10) =28a(11) =42a(12) =58a(13) =82a(14) =110a(15) =150a(16) =200a(17) =263a(18) =344a(19) =450a(20) =578a(21) =741a(22) =947a(23) =1197a(24) =1513a(25) =1899a(26) =2374a(27) =2954a(28) =3669a(29) =4529