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A055727 Number of lucky 4,6 triples <= 10^n. 0

%I #14 Apr 16 2022 05:47:43

%S 0,2,4,14,51,247,1405,8506,55228

%N Number of lucky 4,6 triples <= 10^n.

%C 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

%C A triple is counted in a(n) if its smallest member is at most 10^n. - _Pontus von Brömssen_, Apr 04 2022

%Y Cf. A000959.

%K nonn,less,more

%O 0,2

%A _Robert G. Wilson v_, Jun 09 2000

%E a(7) from _Sean A. Irvine_, Apr 04 2022

%E a(8) from _Pontus von Brömssen_, Apr 04 2022

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Last modified May 9 07:44 EDT 2024. Contains 372346 sequences. (Running on oeis4.)