The Monkees' album Pisces, Aquarius, Capricorn & Jones was a big influence on the Beatles. It is the first album to use a Moog synth on a rock/pop album. mhmm :H
Well, maybe a very small influence since the Beatles had already released 17 of their 21 albums before the Monkees released Pisces, Aquarius, Capricorn & Jones.