Number of integer partitions of n where some part is the difference of two consecutive parts.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =4a(7) =5a(8) =9a(9) =13a(10) =21a(11) =28a(12) =42a(13) =55a(14) =78a(15) =106a(16) =144a(17) =187a(18) =255a(19) =325a(20) =429a(21) =554a(22) =717a(23) =906a(24) =1165a(25) =1460a(26) =1853a(27) =2308a(28) =2899a(29) =3582