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 A111309 Absolute difference between the sum of the odd digits and the sum of the even digits of the n-th prime. 1
 2, 3, 5, 7, 2, 4, 8, 10, 1, 7, 4, 10, 3, 1, 3, 8, 14, 5, 1, 8, 10, 16, 5, 1, 16, 2, 4, 8, 10, 5, 6, 5, 11, 13, 6, 7, 13, 2, 2, 11, 17, 6, 11, 13, 17, 19, 0, 1, 3, 5, 4, 10, 5, 4, 10, 5, 1, 6, 12, 9, 7, 10, 10, 5, 7, 11, 7, 13, 6, 8, 11, 17, 4, 13, 19, 2, 4, 19, 3, 5, 6, 5, 0, 2, 8, 5, 1, 8, 9, 7, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Ivars Peterson, Light Rings EXAMPLE a(9)=1 because the 9th prime is 23 and the absolute difference between 2 & 3 is 1. MATHEMATICA f[n_] := (id = IntegerDigits[ Prime[n]]; Abs[(Plus @@ id) - 2Plus @@ Select[id, OddQ]]); Table[f[n], {n, 91}] CROSSREFS Cf. A071650. Sequence in context: A074464 A074463 A038194 * A007605 A077765 A078400 Adjacent sequences:  A111306 A111307 A111308 * A111310 A111311 A111312 KEYWORD nonn,base AUTHOR Zak Seidov and Robert G. Wilson v, Mar 02 2005 EXTENSIONS Edited by Charles R Greathouse IV, Aug 04 2010 STATUS approved

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Last modified January 19 12:36 EST 2020. Contains 331049 sequences. (Running on oeis4.)