

A164679


Convolve A001399 with sequences which map to 2,3,5,7,11,13,17... A000040 then, by bending when needed, summarize the results in a triangular array.


0



1, 2, 1, 5, 4, 2, 10, 9, 7, 3, 19, 18, 16, 11, 4, 33, 32, 30, 25, 16, 5, 57
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OFFSET

1,2


COMMENTS

Apparently the terms can be constructed by fixing the generating function of the diagonal g_0(x) = 1/(1x)/(1x^2)/(1x^3), A001399, and deriving the generating function of the ith subdiagonal by g_i(x) = g_{i1}(x)/(1x^i), i>=1.  R. J. Mathar, May 17 2016


LINKS

Table of n, a(n) for n=1..22.


EXAMPLE

1;
2, 1;
5, 4, 2;
10, 9, 7, 3;
19, 18, 16, 11, 4;
33, 32, 30, 25, 16, 5;
57


CROSSREFS

Cf. A000098 (first column), A164678 (a similar triangle). Diagonals are A001399, A000601, A097701, A117485, ...
Sequence in context: A113350 A227372 A164678 * A275183 A275131 A280513
Adjacent sequences: A164676 A164677 A164678 * A164680 A164681 A164682


KEYWORD

easy,nonn,tabl,uned


AUTHOR

Alford Arnold, Sep 05 2009


STATUS

approved



