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.

A026919 Uniquification of A026907.

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%I A026919 #11 Aug 23 2025 00:03:26
%S A026919 1,13,28,44,46,67,90,91,118,148,154,181,198,217,239,256,298,343,348,
%T A026919 370,391,442,484,496,553,613,627,650,676,742,758,811,849,883,958,993,
%U A026919 1036,1084,1117,1201,1288,1358,1378,1403,1471,1495
%N A026919 Uniquification of A026907.
%H A026919 G. C. Greubel, <a href="/A026919/b026919.txt">Table of n, a(n) for n = 1..2500</a>
%t A026919 A026919= Table[Binomial[n,k] +3*Binomial[n+4,k+2] -18, {n,0,100}, {k,0,n}]//Flatten// Union;
%t A026919 Table[A026919[[n]], {n,100}] (* _G. C. Greubel_, Aug 22 2025 *)
%o A026919 (SageMath)
%o A026919 def A026907(n,k): return binomial(n,k) +3*binomial(n+4,k+2) -18
%o A026919 A026919= sorted(set(flatten([[A026907(n,k) for k in range(n+1)] for n in range(103)]) ))
%o A026919 print([A026919[n] for n in range(100)]) # _G. C. Greubel_, Aug 22 2025
%Y A026919 Cf. A026907.
%K A026919 nonn
%O A026919 1,2
%A A026919 _Clark Kimberling_