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Search: id:A080287
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| A080287 |
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Successively larger gaps in Ulam numbers start at this Ulam number. |
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+0
3
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| 1, 4, 8, 18, 38, 87, 114, 155, 282, 751, 949, 1257, 1553, 1858, 2178, 4800, 5384, 18796, 37562, 64420, 252719, 933709, 332250401
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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The gaps are in A080288.
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REFERENCES
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D. E. Knuth, The Art of Computer Programming, vol 4A, section 7.1.3, exercise 141 [From Jud McCranie (j.mccranie(AT)comcast.net), Aug 22 2008]
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EXAMPLE
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87 and 97 are successive Ulam numbers and this is the first gap of 10 or larger, so 87 is in the sequence.
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CROSSREFS
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Cf. A002858, A080288.
Sequence in context: A056309 A007784 A008204 this_sequence A075310 A075797 A104137
Adjacent sequences: A080284 A080285 A080286 this_sequence A080288 A080289 A080290
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KEYWORD
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nonn
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AUTHOR
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Jud McCranie (j.mccranie(AT)comcast.net), Feb 12 2003
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EXTENSIONS
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Added a(22) found by Donald Knuth - Jud McCranie (j.mccranie(AT)comcast.net), Aug 22 2008
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