A213534 - OEIS

%I #14 Jun 25 2023 03:38:14

%S 11872177333,128907074146,153592049893,173277915346,218180421013,

%T 372099798262,468167023417,496310532853,499081630666,533381128933,

%U 569616671893,571632935206,579535129813,829161163813,866580745333,945276981106,945635700586,960970734706,975903758266

%N Numbers k such that A047988(k) = A047988(k+1) = 4.

%C Kantke calls these numbers "Vierwertzwillinge", i.e., value-4-twins.

%D Thomas Kantke, Das Spiel Minimum, in: Spektrum der Wissenschaft Spezial Physik - Mathematik - Technik 2/2012, pp. 57-66.

%H Thomas Kantke, <a href="https://www.spektrum.de/magazin/das-spiel-minimum-und-die-zerlegung-natuerlicher-zahlen/820793">The game minimum and the decomposition of natural numbers</a>, Spectrum of Science 4/1993, page 11.

%Y Cf. A047987, A047988.

%K nonn

%O 1,1

%A _Martin Renner_, Jun 13 2012