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A067066 Number of Gnutella users reachable with given connections and hops. 0
1, 2, 1, 3, 4, 1, 4, 9, 6, 1, 5, 16, 21, 8, 1, 6, 25, 52, 45, 10, 1, 7, 36, 105, 160, 93, 12, 1, 8, 49, 186, 425, 484, 189, 14, 1, 9, 64, 301, 936, 1705, 1456, 381, 16, 1, 10, 81, 456, 1813, 4686, 6825, 4372, 765, 18, 1, 11, 100, 657, 3200, 10885, 23436, 27305, 13120 (list; table; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Jordan Ritter, Why Gnutella Can't Scale. No, Really.

FORMULA

T(n, k)=n*sum(i=0, k-1, (n-1)^i)

CROSSREFS

Sequence in context: A093375 A103283 A104698 * A125103 A171275 A107616

Adjacent sequences:  A067063 A067064 A067065 * A067067 A067068 A067069

KEYWORD

nonn,tabl,easy

AUTHOR

Michael Somos, Feb 17 2002

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.