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A137706 Smallest number at which a new Haar graph is encountered. 1
1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 15, 16, 17, 19, 23, 31, 32, 33, 34, 35, 36, 37, 39, 42, 43, 45, 47, 63, 64, 65, 67, 69, 71, 75, 79, 95, 127, 128, 129, 130, 131, 133, 135, 136, 137, 138, 139, 141, 143, 151, 153, 155, 159, 170, 171, 175, 187, 191, 255, 256, 257, 259, 260 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..63.

Eric Weisstein's World of Mathematics, Haar Graph

EXAMPLE

Haar(5) and Haar(6) are both isomorphic to the 6-cycle graph, so 5 appears in the sequence but 6 does not.

CROSSREFS

Cf. A272919 (numbers that uniquely index a Haar graph).

Sequence in context: A107686 A004743 A114994 * A324766 A039224 A161508

Adjacent sequences:  A137703 A137704 A137705 * A137707 A137708 A137709

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Feb 07 2008

EXTENSIONS

Name clarified by Eric W. Weisstein, Aug 19 2017

STATUS

approved

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Last modified April 1 10:33 EDT 2020. Contains 333159 sequences. (Running on oeis4.)