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A020754 Increasing gaps between squarefree numbers (lower end). 6
1, 3, 7, 47, 241, 843, 22019, 217069, 1092746, 8870023, 221167421, 47255689914, 82462576219, 1043460553363, 79180770078547 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

The first gap in A005117 occurs between 1 and 2 and has length 1. The next largest gap occurs between 3 and 5 and has length 2. The next largest gap is between 7 and 10 and has length 3. Etc. We are only interested in gaps that set new records.

CROSSREFS

Cf. A005117, A020753, A020755, A045882, A051681.

Sequence in context: A074714 A064457 A005650 * A052381 A031440 A001566

Adjacent sequences:  A020751 A020752 A020753 * A020755 A020756 A020757

KEYWORD

nonn,hard,nice

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

EXTENSIONS

Thanks to Christian Bower for additional comments.

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.