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A055727
Number of lucky 4,6 triples <= 10^n.
0
0, 2, 4, 14, 51, 247, 1405, 8506, 55228
OFFSET
0,2
COMMENTS
A lucky 4,6 triple is a triple (k, k+4, k+6) such that k, k+4, and k+6 are lucky numbers and no other number between k and k+6 is lucky. - Sean A. Irvine, Apr 04 2022
A triple is counted in a(n) if its smallest member is at most 10^n. - Pontus von Brömssen, Apr 04 2022
CROSSREFS
Cf. A000959.
Sequence in context: A092665 A046650 A327235 * A003500 A316363 A295760
KEYWORD
nonn,less,more
AUTHOR
Robert G. Wilson v, Jun 09 2000
EXTENSIONS
a(7) from Sean A. Irvine, Apr 04 2022
a(8) from Pontus von Brömssen, Apr 04 2022
STATUS
approved