Standard input is empty

n = 1: 1
n = 2: 4
n = 3: 12
n = 4: 32
n = 5: 80
n = 6: 192
n = 7: 448
n = 8: 1024
n = 9: 2304
n = 10: 5120
n = 11: 11264
n = 12: 24576
n = 13: 53248
n = 14: 114688
n = 15: 245760
n = 16: 524288
n = 17: 1114112
n = 18: 2359296
n = 19: 4980736
n = 20: 10485760
n = 21: 22020096
n = 22: 46137344
n = 23: 96468992
n = 24: 201326592
n = 25: 419430400
n = 26: 872415232
n = 27: 1811939328
n = 28: 3758096384
n = 29: 7784628224
n = 30: 16106127360
n = 31: 33285996544
n = 32: 68719476736
n = 33: 141733920768
n = 34: 292057776128
n = 35: 601295421440
n = 36: 1236950581248
n = 37: 2542620639232
n = 38: 5222680231936
n = 39: 10720238370816
n = 40: 21990232555520
n = 41: 45079976738816
n = 42: 92358976733184
n = 43: 189115999977472
n = 44: 387028092977152
n = 45: 791648371998720
n = 46: 1618481116086272
n = 47: 3307330976350208
n = 48: 6755399441055744
n = 49: 13792273858822144
n = 50: 28147497671065600