For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:nodejs/openSUSE_Tumbleweed/devel:languages:nodejs.repo
zypper refresh
zypper install nodejs4
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:nodejs/openSUSE_Factory_PowerPC/devel:languages:nodejs.repo
zypper refresh
zypper install nodejs4
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:nodejs/openSUSE_Factory_ARM/devel:languages:nodejs.repo
zypper refresh
zypper install nodejs4