404. That’s an error.

The requested URL /translate_c?depth=1&rurl=translate.google.ru&sl=en&sp=nmt4&tl=ru&u=https://en.wikipedia.org/wiki/Triangular_number&xid=17259,15700023,15700043,15700186,15700191,15700259,15700271,15700302&usg=ALkJrhi-Nm1Z5O1ormNo8q24e4g1TJVCWg was not found on this server. That’s all we know.