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.

A112508 Counts the objects described in A047969 and A089246 when grouped by minimum part. (Row sums give A047970).

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%I A112508 #2 Mar 31 2012 13:23:37
%S A112508 1,1,1,1,1,3,1,1,3,9,1,1,3,9,29,1,1,3,9,29,101
%N A112508 Counts the objects described in A047969 and A089246 when grouped by minimum part. (Row sums give A047970).
%e A112508 Row 4 of the triangular array is (1 1 3 9) because there are nine tuples with a minimum value of 1, three tuples with a minimum value of 2, one tuple with a minimum value of 3 and one tuple with a minimum value of 4; the relevant unordered partitions are illustrated in the below Gaussian polynomial template:
%e A112508 4
%e A112508 31 32 33
%e A112508 211 221 222
%e A112508 1111
%Y A112508 Cf. A047969, A089246.
%K A112508 easy,nonn
%O A112508 1,6
%A A112508 _Alford Arnold_, Sep 08 2005