As character names:

U+1D68B MATHEMATICAL MONOSPACE SMALL B character (𝚋)

As raw characters:

𝚋

As a string of HTML entities:

𝚋

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 154, hex 0x9A, octal \232, binary 10011010
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 139, hex 0x8B, octal \213, binary 10001011
This is continuation byte 3, expecting 0 more.

U+1D68B	MATHEMATICAL MONOSPACE SMALL B
	# <font> 0062 latin small letter b