Looking for MIT Scheme code actually has a lot to do with archaeology.
https://oeis.org/A091247/a091247.scm.txt
This file contains the Scheme-functions that compute the sequence A091202-A091233 & A091238-A091257 A106442-A106447 & A106451-A106457 & A106490-A106495 found in Neil Sloane's On-Line Encyclopedia of Integer Sequences (OEIS) available at http://www.research.att.com/~njas/sequences/