[1,1,2,4,9,21,52,133,351,948,2610,7298,20672,
59192,171059,498275,1461437,4312300,12792342,
38128354,114126797,342914278,1033914760,
3127154610,9485523742,28848101993,87948036401,
268724650863,822791384597,2524113596369,
7757247543181,23880003051017,73627904162143,
227347168628991,702970760225573,2176459051318522]
|