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 A145352 #5 Jun 02 2025 00:39:00 %S A145352 1,0,2,0,0,3,0,2,0,4,0,0,0,0,5,0,4,6,0,0,6,0,0,0,0,0,0,7,0,4,0,12,0,0, %T A145352 0,8,0,0,15,0,0,0,0,0,9,0,8,0,0,20,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,11, %U A145352 0,4,21,36,0,30,0,0,0,0,0,12 %N A145352 Triangle read by rows, A054525 * A157497. %C A145352 Row sums = A156833: (1, 2, 3, 6, 5, 16, 7,...) %F A145352 Inverse Mobius transform of triangle A157497. %e A145352 First few rows of the triangle = %e A145352 1; %e A145352 0, 2; %e A145352 0, 0, 3; %e A145352 0, 2, 0, 4; %e A145352 0, 0, 0, 0, 5; %e A145352 0, 4, 6, 0, 0, 6; %e A145352 0, 0, 0, 0, 0, 0, 7; %e A145352 0, 4, 0, 12, 0, 0, 0, 8; %e A145352 0, 0, 15, 0, 0, 0, 0, 0, 9; %e A145352 0, 8, 0, 0, 20, 0, 0, 0, 0, 10; %e A145352 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11; %e A145352 0, 4, 21, 36, 0, 30, 0, 0, 0, 0, 0, 12; %e A145352 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13; %e A145352 0, 12, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 14; %e A145352 ... %Y A145352 Cf. A157497, A054525, A156833 %K A145352 nonn,tabl %O A145352 1,3 %A A145352 _Gary W. Adamson_ & _Mats Granvik_, Mar 01 2009