|
%I #15 Jun 06 2020 12:29:43
%S 1,1,37,87,87,72979
%N a(n) is the least number that starts an arithmetic progression of n consecutive lucky numbers.
%C The difference is 6 in the arithmetic progressions that correspond to a(3)-a(6).
%C Calculated using _Hugo van der Sanden_'s Lucky numbers up to 10^9 (private communication).
%C a(7) > 999999990, if it exists.
%C a(7) > 4*10^9, if it exists. - _Giovanni Resta_, May 10 2020
%e a(3) = 37 since {37, 43, 49} = {37, 37 + 6, 37 + 2*6} are the least 3 consecutive lucky numbers in an arithmetic progression.
%Y Cf. A000959, A006560.
%K nonn,more
%O 1,3
%A _Amiram Eldar_, Dec 12 2019
%E Name edited by _Petros Hadjicostas_, Jun 06 2020
|
