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 A165969 #10 Jan 12 2019 20:45:04 %S A165969 3,16,5,90,36,14,576,252,128,54,4200,1920,1080,600,264,34560,16200, %T A165969 9600,5940,3456,1560,317520,151200,92400,60480,39312,23520,10800, %U A165969 3225600,1552320,967680,655200,451584,302400,184320,85680,35925120,17418240,11007360,7620480,5443200,3870720,2643840,1632960,766080 %N A165969 Triangle read by rows: T(n,m) = A094310(n,m)*A120070(n+1,m), 1 <= m <= n. %C A165969 The second array mentioned in the comment in A129326. %e A165969 Triangle begins %e A165969 3; %e A165969 16, 5; %e A165969 90, 36, 14; %e A165969 576, 252, 128, 54; %e A165969 4200, 1920, 1080, 600, 264; %e A165969 34560, 16200, 9600, 5940, 3456, 1560; %e A165969 317520, 151200, 92400, 60480, 39312, 23520, 10800; %e A165969 3225600, 1552320, 967680, 655200, 451584, 302400, 184320, 85680; %p A165969 A120070 := proc(n, m) n^2-m^2 ; end proc: %p A165969 A094310 := proc(n,m) n!/m ; end proc: %p A165969 A165969 := proc(n,m) A094310(n,m)*A120070(n+1,m) ; end proc: # _R. J. Mathar_, Jan 23 2011 %Y A165969 Cf. A077012, A079210. %K A165969 nonn,tabl,easy %O A165969 1,1 %A A165969 _Paul Curtz_, Oct 02 2009