As character names:

U+2206 INCREMENT 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 134, hex 0x86, octal \206, binary 10000110
This is continuation byte 2, expecting 0 more.

U+2206	INCREMENT
	= Laplace operator
	= forward difference
	= symmetric difference (in set theory)
	* other symbols may also be used for symmetric difference
	x (greek capital letter delta - 0394)
	x (white up-pointing triangle - 25B3)