1437. 4+3=7. 1 and 4 are powers of 2 and 3 and 7 are powers if 2 minus 1. 1+4+3+7=15 which is power of 2 minus 1.
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ǝʌǝʇs ʞɐıuzoʍ at InterContinental Toronto Centre
1437. 4+3=7. 1 and 4 are powers of 2 and 3 and 7 are powers if 2 minus 1. 1+4+3+7=15 which is power of 2 minus 1.