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Search: id:A011918
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A011918 A011916(n) + A011922(n) - 1. +0
3
5, 76, 1065, 14840, 206701, 2878980, 40099025, 558507376, 108347552060 (list; graph; listen)
OFFSET

1,1
REFERENCES

Mario VELUCCHI "Seeing couples" in Recreational and Educational Computing, to appear 1997.

CROSSREFS

Sequence in context: A034688 A132855 A051481 this_sequence A136300 A144997 A088756

Adjacent sequences: A011915 A011916 A011917 this_sequence A011919 A011920 A011921

KEYWORD

nonn,easy

AUTHOR

Mario Velucchi (mathchess(AT)velucchi.it)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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