Wikipedia
Harikambhoji (pronounced harikāmbhōji) is a rāgam in Carnatic music (musical scale of South Indian classical music). It is the 28th Melakarta rāgam (parent scale) in the 72 melakarta rāgam system.
One of the first scales employed by the ancient Tamils(3BCE) was the Mullaipann, a pentatonic scale composed of the notes sa ri ga pa da, equivalent to C, D, E, G and A in the western notations. These fully harmonic scales, constitutes the raga Mohanam in the Carnatic music style. Mullaipann further evolved into Sempaalai, a scale based on seven notes by the addition of two more notes, ma and ni to the pentatonic scale. Sempaalai pann corresponds to the Carnatic raga Harikambhoji.
Khamaj thaat of Hindustani Music is the equivalent to this rāgam. It is known as Harikedāragowla in the Muthuswami Dikshitar school of music.
In Western music, Mixolydian mode is this raga's equivalent.