As character names:

U+178E KHMER LETTER NNO character (ណ)

As raw characters:

ណ

As a string of HTML entities:

ណ

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 158, hex 0x9E, octal \236, binary 10011110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 142, hex 0x8E, octal \216, binary 10001110
This is continuation byte 2, expecting 0 more.

U+178E	KHMER LETTER NNO
	* as this character belongs to the first register, its correct transliteration is nna, not nno