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A128626 A triangular array distributing the values of sequence A072213 (cf. A115994). 2

%I #7 Feb 06 2019 00:25:07

%S 1,4,1,9,20,1,16,140,74,1,25,572,1136,224,1,36,1785,8866,6685,604,1,

%T 49,4600,47152,88380,31851,1492,1,64,10416,194282,737059,665542,

%U 130808,3458,1,81,21320,665769,4512584,8211274,4105870,479826,7602,1,100,40425

%N A triangular array distributing the values of sequence A072213 (cf. A115994).

%H Nathaniel Johnston, <a href="/A128626/b128626.txt">Table of n, a(n) for n = 0..209</a>

%e A115994 distributes the numeric partition sequence A000041 and A072213 records partition values for sequence A000290 (the squares).

%e Therefore the table begins:

%e 1;

%e 4, 1;

%e 9, 20, 1;

%e 16, 140, 74, 1;

%e 25, 572, 1136, 224, 1;

%e 36, 1785, 8866, 6685, 604, 1;

%e 49, 4600, 47152, 88380, 31851, 1492, 1;

%e ...

%p nn:=8: g:=sum(t^k*q^(k^2)/product((1-q^j)^2, j=1..k), k=1..nn): gser:=series(g, q=0, nn^2+1): for n from 1 to nn do P[n]:=coeff(gser, q^(n^2)) od: for n from 1 to nn do seq(coeff(P[n], t^j), j=1..n); od; # _Nathaniel Johnston_, Apr 30 2011

%Y Cf. A000041, A000290, A115994.

%K nonn,tabl

%O 0,2

%A _Alford Arnold_, Mar 15 2007

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Last modified September 12 19:14 EDT 2024. Contains 375853 sequences. (Running on oeis4.)