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A055727 Number of lucky 4,6 triples <= 10^n. 0
0, 2, 4, 14, 51, 247, 1405 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..6.

CROSSREFS

Sequence in context: A212268 A092665 A046650 * A003500 A129876 A038055

Adjacent sequences:  A055724 A055725 A055726 * A055728 A055729 A055730

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jun 09 2000

STATUS

approved

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Last modified November 23 00:33 EST 2017. Contains 295107 sequences.