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Today is Day 148 of 2017

148

is an heptagonal number.
is the number of 6-vertex perfect graphs.

= 32 + 32 + 32 + 112 = 52 + 52 + 72 + 72 (sum of squares)
= 22 + 122
= (12 + 12)(52 + 72)

Many thanks are extended to Archimedes' Lab for their information.




148

Today is day number   of 2017. Below are various representations of the number 148, some dating thousands of years, and some very modern.

Chinese

Egyptian

Mayan

 

Babylonian

Greek

Abacus

Roman

 

Hex

 

Binary

 

Many thanks are extended to Jo Edkins for her wonderful work.

 



 

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