v3.25.1
Form N-1A Cover
Apr. 25, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name Sequoia Fund, Inc.
Entity Central Index Key 0000089043
Entity Investment Company Type N-1A
Document Period End Date Apr. 25, 2025
Prospectus Date May 01, 2025