I wrote: > ... A check on the spreadsheet is that I have the bag emptying completely > at k=19, 39, 59, 79, 98, 139, 159, 179, 219, 239, 259, 279, 319, 359, 379, > 419, 439, 459, 479, 519, 539, 579, 619, 639, 659, 679, 719, 739, 759, 819, > 839, 859, 879, 1019, ... Correction: the last term should be 1039, not 1019. David