editing
approved
editing
approved
SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {3, 1}]>0, 1, 0], {n, 2500}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 05 2020 *)
approved
editing
Clark Kimberling (ck6(AT)evansville.edu)
String Numbers n such that string 3,1 occurs in the base 8 representation of n but not of n+1.
nonn,base,new
nonn,base,new
Clark Kimberling, (ck6(AT)evansville.edu)
String 3,1 occurs in the base 8 representation of n, but not of n+1.
nonn,base,new
Clark Kimberling, ck6@cedar.(AT)evansville.edu
String 3,1 occurs in the base 8 representation of n, but not of n+1.
25, 89, 153, 207, 217, 281, 345, 409, 473, 537, 601, 665, 719, 729, 793, 857, 921, 985, 1049, 1113, 1177, 1231, 1241, 1305, 1369, 1433, 1497, 1561, 1663, 1689, 1743, 1753, 1817, 1881, 1945, 2009, 2073, 2137, 2201, 2255, 2265
1,1
nonn,base
Clark Kimberling, ck6@cedar.evansville.edu
approved