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A091010 Numbers having no divisor d such that also d-x and d+x are divisors for some x. 4
1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 73, 74, 76, 77, 79, 81, 82, 83, 85, 86, 87, 88, 89, 92, 93, 94 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A091009(a(n)) = 0; complement of A091011.

LINKS

Table of n, a(n) for n=1..71.

CROSSREFS

Sequence in context: A307750 A319630 A324849 * A306528 A116358 A060683

Adjacent sequences:  A091007 A091008 A091009 * A091011 A091012 A091013

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 13 2003

STATUS

approved

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Last modified May 13 02:36 EDT 2021. Contains 343836 sequences. (Running on oeis4.)