As character names:

U+22A1 SQUARED DOT OPERATOR 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 138, hex 0x8A, octal \212, binary 10001010
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+22A1	SQUARED DOT OPERATOR
	x (alchemical symbol for urine - 1F755)
	x (right open squared dot - 1FBBC)