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Search: id:A133221
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A133221 A001147 with each term repeated. +0
2
1, 1, 1, 1, 3, 3, 15, 15, 105, 105, 945, 945, 10395, 10395, 135135, 135135, 2027025, 2027025, 34459425, 34459425, 654729075, 654729075, 13749310575, 13749310575, 316234143225, 316234143225, 7905853580625, 7905853580625, 213458046676875, 213458046676875 (list; graph; listen)
OFFSET

0,5

COMMENT

Normally such sequences are excluded from the OEIS, but I have made an exception for this one because so many variants of it have occurred in recent submissions.

CROSSREFS

Sequence in context: A100735 A129356 A055634 this_sequence A110096 A127328 A002891

Adjacent sequences: A133218 A133219 A133220 this_sequence A133222 A133223 A133224

KEYWORD

nonn

AUTHOR

njas, Oct 13 2007

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.


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