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 A175814 Numbers n such that the first n decimal digits of e contain equal numbers of even and odd decimal digits. 0
 2, 4, 50, 68, 70, 72, 74, 352, 804, 808, 810, 812, 964, 966, 980, 982, 986, 988, 994, 996, 998, 1002, 1004, 1006, 1016, 1018, 1020, 1022, 1026, 1028, 1030, 1048, 1060, 1062, 1064, 1066, 1068, 1130, 1134, 1138, 1140, 1254, 1256, 1258, 1260, 1320, 1340, 2484 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Numbers n such that the first n decimal digits of e contain equal numbers of even and odd decimal digits. LINKS Table of n, a(n) for n=1..48. EXAMPLE 4 is in the sequence because, with 4 digits of e = 2.718 -> (-1)^2 + (-1)^7 + (-1)^1 + (-1)^8 = 0. MATHEMATICA L= Rest@FoldList[ Plus, 0, (-1)^First@ RealDigits[E, 10, 3000]] ; Do[If [L[[n]]==0, Print[n]], {n, 3000}] CROSSREFS Cf. A175793 Sequence in context: A228596 A032019 A181179 * A303382 A303443 A277034 Adjacent sequences: A175811 A175812 A175813 * A175815 A175816 A175817 KEYWORD nonn,base AUTHOR Michel Lagneau, Sep 09 2010 STATUS approved

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Last modified December 2 02:40 EST 2023. Contains 367505 sequences. (Running on oeis4.)