As character names:

U+2204 THERE DOES NOT EXIST 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 136, hex 0x88, octal \210, binary 10001000
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 132, hex 0x84, octal \204, binary 10000100
This is continuation byte 2, expecting 0 more.

U+2204	THERE DOES NOT EXIST
	: 2203 0338