cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A247900 First differences of A247681.

This page as a plain text file.
%I A247900 #16 Sep 02 2020 02:58:52
%S A247900 54,36,54,72,18,18,36,36,18,18,54,36,18,36,54,36,54,18,18,18,18,54,18,
%T A247900 54,18,36,54,18,54,18,36,18,36,54,18,18,18,18,54,18,18,18,18,18,36,36,
%U A247900 18,18,72,18,36,36,36,18,36,54,18,18,36,18,18,18,18,18,54,36,36,18,72,18,18,72,18,36,36,18,18,18,36,90
%N A247900 First differences of A247681.
%C A247900 All terms have digital root equal to 9.
%H A247900 Odimar Fabeny, <a href="/A247900/b247900.txt">Table of n, a(n) for n = 1..9999</a> [first term removed by _Georg Fischer_, Sep 02 2020]
%t A247900 Differences[Select[Range[1,3500,18],!PrimeQ[#]&]] (* _Harvey P. Dale_, Apr 25 2018 *)
%Y A247900 Cf. A247681.
%K A247900 nonn,easy
%O A247900 1,1
%A A247900 _Odimar Fabeny_, Sep 26 2014
%E A247900 First term 54 removed by _Georg Fischer_, Sep 02 2020