As character names:

U+1E50 LATIN CAPITAL LETTER O WITH MACRON AND GRAVE character (Ṑ)

As raw characters:

Ṑ

As a string of HTML entities:

Ṑ

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 185, hex 0xB9, octal \271, binary 10111001
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 144, hex 0x90, octal \220, binary 10010000
This is continuation byte 2, expecting 0 more.

U+1E50	LATIN CAPITAL LETTER O WITH MACRON AND GRAVE
	: 014C 0300