Closed pipe: node at closed end, antinode at open end. $L = (2n-1)\lambda/4$ for $n = 1, 2, 3, ...$. Frequencies: $f_n = (2n-1)v/(4L)$. Only odd harmonics: $f_1 = v/(4L)$, $3f_1$, $5f_1$, ... The fundamental is half that of an open pipe of the same length. The missing even harmonics give the closed pipe a "hollow" or "dull" sound quality. First overtone of closed pipe ($3f_1$) is the 3rd harmonic, NOT the 2nd.