Wget Several Files Using Bash Cmd

I want to down the lecture notes on the page

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http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-001-structure-and-interpretation-of-computer-programs-spring-2005/lecture-notes/

Here is the command I am using.

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wget http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-001-structure-and-interpretation-of-computer-programs-spring-2005/lecture-notes/lecture{1..26}webhand.pdf

The sad thing is not all the sequences are consecutive.