What type of model of DNA did Linus Pauling INCORRECTLY propose?

Linus Pauling incorrectly proposed a triple helix model of DNA, suggesting that three strands of nucleotides intertwined around each other. His model posited that the sugar-phosphate backbones were on the inside, with the bases facing outward, which was contrary to the actual structure of DNA. This model was ultimately proven incorrect by James Watson and Francis Crick, who established the correct double helix structure of DNA in 1953.