1,1
Or, numbers that are palindromic and begin with 5.
Adjacent sequences: A043037 A043038 A043039 this_sequence A043041 A043042 A043043
Sequence in context: A138163 A081300 A045640 this_sequence A062183 A002279 A119292
nonn,base
Clark Kimberling (ck6(AT)evansville.edu)
Search completed in 0.002 seconds