As character names:

U+25A1 WHITE SQUARE character (□)

As raw characters:

□

As a string of HTML entities:

□

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 150, hex 0x96, octal \226, binary 10010110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 161, hex 0xA1, octal \241, binary 10100001
This is continuation byte 2, expecting 0 more.

U+25A1	WHITE SQUARE
	= quadrature
	= alchemical symbol for salt
	* used in astrological contexts for aspect square
	* may be used to represent a missing ideograph
	x (combining enclosing square - 20DE)
	x (white medium square - 25FB)
	x (ballot box - 2610)
	x (white large square - 2B1C)
	x (geta mark - 3013)