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editing
approved
editing
approved
"SOD" = "sum of digits", A007953.
proposed
editing
editing
proposed
Subset of intersection of A002113 and A005349. - David A. Corneth, Aug 23 2016
editing
proposed
editing
proposed
C. Rivera, PrimePuzzles.Net, <a href="http://www.primepuzzles.net/puzzles/puzz_041.htm">Puzzle 41.- Palindromic Carnival</a>, section B.
Cf. A007953.
proposed
editing
editing
proposed