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.

A051182 Number of 5-element intersecting families of an n-element set.

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%I A051182 #8 Apr 10 2022 14:28:11
%S A051182 0,0,0,0,371,38163,2236504,103998636,4289058501,164693276181,
%T A051182 6034793020298,213993130915542,7407880110115111,251837583669470799,
%U A051182 8443568934653875932,280082506996725346368
%N A051182 Number of 5-element intersecting families of an n-element set.
%D A051182 V. Jovovic, G. Kilibarda, On the number of Boolean functions in the Post classes F^{mu}_8, Diskretnaya Matematika, 11 (1999), no. 4, 127-138 (translated in Discrete Mathematics and Applications, 9, (1999), no. 6).
%F A051182 1/5!(32^n-10*24^n+30*20^n-5*18^n+5*17^n-80*16^n-30*15^n+135*14^n+30*13^n-80*12^n-2*11^n+10*10^n-100*9^n+240*8^n-160*7^n-44*6^n+95*5^n-85*4^n+50*3^n+24*2^n-24).
%Y A051182 Cf. A036239, A051180-A051185.
%K A051182 nonn
%O A051182 0,5
%A A051182 _Vladeta Jovovic_, Goran Kilibarda