Number of n-stacks with strictly receding walls, or the number of Type A partitions of n in the sense of Auluck (1951).

A001522

Number of n-stacks with strictly receding walls, or the number of Type A partitions of n in the sense of Auluck (1951).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =7a(8) =10a(9) =14a(10) =19a(11) =26a(12) =35a(13) =47a(14) =62a(15) =82a(16) =107a(17) =139a(18) =179a(19) =230a(20) =293a(21) =372a(22) =470a(23) =591a(24) =740a(25) =924a(26) =1148a(27) =1422a(28) =1756a(29) =2161

External references