谢谢独木星空谁!
x+y+z+u+v+m=N的解组数,限制条件未知数取数不能取10的倍数
N是10的倍数余数是0,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 126, 10872, 96003, 425574, 1329075, 3348576, 7291872, 14285628, 25828524, 43844400}
N是10的倍数余数是1,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 252, 14244, 113976, 483048, 1469804, 3640476, 7832328, 15206800, 27302652, 46089108}
N是10的倍数余数是2,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 462, 18369, 134496, 546533, 1622229, 3952536, 8404753, 16175670, 28844712, 48427083}
N是10的倍数余数是3,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 792, 23364, 157796, 616398, 1786854, 4285366, 9009798, 17192820, 30455052, 50858208}
N是10的倍数余数是4,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 1287, 29374, 184176, 693153, 1964454, 4640061, 9648933, 18260150, 32136057, 53385408}
N是10的倍数余数是5,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{0, 1996, 36552, 213948, 777324, 2155824, 5017740, 10323656, 19379592, 33890148, 56011648}
N是10的倍数余数是6,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{1, 2973, 45060, 247437, 869454, 2361780, 5419547, 11035494, 20553111, 35719783, 58739934}
N是10的倍数余数是7,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{6, 4278, 55070, 284982, 970104, 2583160, 5846652, 11786004, 21782706, 37627458, 61573314}
N是10的倍数余数是8,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{21, 5978, 66765, 326937, 1079854, 2820825, 6300252, 12576774, 23070411, 39615708, 64514879}
N是10的倍数余数是9,LinearRecurrence[{6, -15, 20, -15, 6, -1}, 15]
{56, 8148, 80340, 373672, 1199304, 3075660, 6781572, 13409424, 24418296, 41687108, 67567764} |