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 A210345 The number of degree sequences of simple graphs with n vertices with all even degrees. 2
 1, 1, 2, 3, 7, 14, 36, 74, 201, 425, 1178, 2515, 7063, 15209, 43088, 93382, 266236, 579950, 1661548, 3634062, 10451798, 22935259, 66170288, 145601216, 421164456, 928875440, 2692737120, 5950570725, 17282501978, 38257352346, 111292168834, 246730727752, 718763328317, 1595578916923, 4653944394630 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS a(2n) = A210346(n). For even n, the complementary sequence has all odd degrees. LINKS Table of n, a(n) for n=1..35. EXAMPLE For n=3, there are only two degree sequences with all even terms are possible: {0,0,0} and {2,2,2}. Thus, a(3)=2. CROSSREFS Cf. A210346, A049339 Sequence in context: A113822 A036250 A191491 * A006660 A306844 A213906 Adjacent sequences: A210342 A210343 A210344 * A210346 A210347 A210348 KEYWORD nonn AUTHOR Tanya Khovanova and Dai Yang, Mar 20 2012 EXTENSIONS a(13)-a(35) from Robert Gerbicz, Apr 08 2012 STATUS approved

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Last modified October 4 09:31 EDT 2023. Contains 365873 sequences. (Running on oeis4.)