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A343136 Positions of records in A188171. 0

%I

%S 1,5,45,315,585,2205,2925,9945,17325,28665,45045,135135,225225,405405,

%T 675675,1576575,2027025,2297295,3828825,6891885,11486475,26801775,

%U 34459425,43648605,72747675,130945815,218243025,509233725,654729075,1003917915,1527701175,3011753745,4583103525

%N Positions of records in A188171.

%e 585 is in the sequence as A188171(585) = 4 via the divisors 5, 13, 45 and 117 and no positive integer < 585 has at least four such (5 (mod 8)) divisors.

%t Function[{s, r}, Map[FirstPosition[s, #][[1]] &, r]] @@ {#, Union@ FoldList[Max, #]} &@ Array[DivisorSum[#, 1 &, Mod[#, 8] == 5 &] &, 10^6] (* _Michael De Vlieger_, Apr 08 2021 *)

%Y Cf. A188171, A343106.

%K nonn

%O 1,2

%A _David A. Corneth_, Apr 06 2021

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Last modified July 31 10:51 EDT 2021. Contains 346373 sequences. (Running on oeis4.)