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.
%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_