Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Mar 30 2012 18:37:15
%S 1,2,8,45,318,2671,25805,280609,3381993,44658052,640279918,9895457035,
%T 163871617543,2893296199441,54230087607409,1075060346670798,
%U 22467666780553040,493590689966427930,11369641989418301977
%N Column 1 of triangle A152400; also, column 1 of square array A152405.
%C Matrix powers of triangle T=A152400 satisfy: column k of T^(j+1) = column j of T^(k+1) for all j>=0, k>=0.
%H Paul D. Hanna, <a href="/A152401/b152401.txt">Table of n, a(n), n=0..100.</a>
%Y Cf. A152400; A127715, A152402, A152403, A152404; A152405.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Dec 05 2008