Dealing cards in a game of solitaire.

Terms

a(0) =0a(1) =1a(2) =2a(3) =21a(4) =31a(5) =32a(6) =321a(7) =421a(8) =431a(9) =432a(10) =4321a(11) =5321a(12) =5421a(13) =5431a(14) =5432a(15) =54321a(16) =64321a(17) =65321a(18) =65421a(19) =65431a(20) =65432a(21) =654321a(22) =754321a(23) =764321a(24) =765321a(25) =765421a(26) =765431a(27) =765432a(28) =7654321a(29) =8654321