As character names:

U+2294 SQUARE CUP 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 148, hex 0x94, octal \224, binary 10010100
This is continuation byte 2, expecting 0 more.

U+2294	SQUARE CUP
	x (n-ary square union operator - 2A06)
	~ 2294 FE00 with serifs