Number of ways to remove n oranges from an infinite stack of oranges whose m-th layer is an m X (m+3) rectangle.

A274597

Number of ways to remove n oranges from an infinite stack of oranges whose m-th layer is an m X (m+3) rectangle.

Terms

    a(0) =1a(1) =4a(2) =10a(3) =28a(4) =68a(5) =158a(6) =350a(7) =750a(8) =1559a(9) =3170a(10) =6292a(11) =12252a(12) =23445a(13) =44164a(14) =81995a(15) =150288a(16) =272150a(17) =487388a(18) =863887a(19) =1516592a(20) =2638648a(21) =4552488a(22) =7792566a(23) =13239698a(24) =22336630a(25) =37433466a(26) =62337628a(27) =103186612a(28) =169824540a(29) =277967860

External references