A038497 - OEIS

%I #9 Dec 19 2015 12:17:13

%S 1,2,1,3,2,1,5,5,2,1,7,8,5,2,1,11,15,10,5,2,1,15,23,18,10,5,2,1,22,38,

%T 31,20,10,5,2,1,30,56,52,34,20,10,5,2,1,42,86,83,60,36,20,10,5,2,1,56,

%U 123,129,97,63,36,20,10,5,2,1,77,181,198,158,105,65,36,20,10,5,2,1

%N Matrix square of partition triangle A008284.

%C Row sums form A022811 (number of terms in n-th derivative of a function composed with itself 3 times). - _Paul D. Hanna_, Jul 13 2004

%e 1; 2,1; 3,2,1; 5,5,2,1; ...

%Y Cf. A038498, A039800-A039809. a(n, 1) = A000041(n) (first column) (partition numbers).

%Y Cf. A022811.

%K nonn,tabl

%O 1,2

%A _Christian G. Bower_, Feb 15 1999