As character names:

U+2145 DOUBLE-STRUCK ITALIC CAPITAL D character (ⅅ)

As raw characters:

ⅅ

As a string of HTML entities:

ⅅ

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 133, hex 0x85, octal \205, binary 10000101
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 133, hex 0x85, octal \205, binary 10000101
This is continuation byte 2, expecting 0 more.

U+2145	DOUBLE-STRUCK ITALIC CAPITAL D
	* sometimes used for the differential
	# <font> 0044 latin capital letter d