Number of integer partitions of n whose first differences have mean -1.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =2a(6) =1a(7) =3a(8) =2a(9) =5a(10) =4a(11) =8a(12) =7a(13) =12a(14) =12a(15) =19a(16) =19a(17) =29a(18) =31a(19) =43a(20) =48a(21) =65a(22) =73a(23) =97a(24) =110a(25) =142a(26) =164a(27) =208a(28) =240a(29) =301