Number of ways to remove n oranges from an infinite stack of oranges whose m-th layer is an m X (m+1) rectangle.

A274594

Number of ways to remove n oranges from an infinite stack of oranges whose m-th layer is an m X (m+1) rectangle.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =12a(4) =29a(5) =64a(6) =139a(7) =286a(8) =582a(9) =1148a(10) =2227a(11) =4234a(12) =7950a(13) =14692a(14) =26842a(15) =48438a(16) =86509a(17) =152902a(18) =267783a(19) =464766a(20) =800095a(21) =1366512a(22) =2316840a(23) =3900502a(24) =6523432a(25) =10841282a(26) =17909533a(27) =29416966a(28) =48055443a(29) =78093926

External references