Hello there, I am conducting some experiments with sequences mod M, for various M and found this interesting pattern with Ramanujan Tau function with the number 23 and multiples of 23. http://www.lacim.uqam.ca/%7Eplouffe/OEIS/A000594%20mod%2023M/ So what I did is a graph of RamanujanTau[n] mod 23M, where M=1,2,3... on the unit circle to <see> the pattern, and here it is, very nice(!). simon plouffe