A107724 Matrix logarithm of triangle A107719, read by rows.
0, 1, 0, 4, 2, 0, 31, 10, 3, 0, 343, 88, 19, 4, 0, 4855, 1066, 199, 31, 5, 0, 83209, 16216, 2779, 382, 46, 6, 0, 1670743, 295360, 47791, 6130, 655, 64, 7, 0, 38436673, 6254824, 970849, 119182, 11929, 1036, 85, 8, 0, 996825703, 150917560, 22697647, 2703730
Offset: 0
Examples
Triangle begins: 0; 1,0; 4,2,0; 31,10,3,0; 343,88,19,4,0; 4855,1066,199,31,5,0; 83209,16216,2779,382,46,6,0; 1670743,295360,47791,6130,655,64,7,0; 38436673,6254824,970849,119182,11929,1036,85,8,0; ...
Programs
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PARI
T(n,k)=local(L,M=matrix(n+1,n+1,m,j,if(m>=j,if(m==j,1,if(m==j+1,-3*j, polcoeff(1/sum(i=0,m-j,prod(r=0,i-1,3*r+1)*x^i)+O(x^m),m-j)))))^-1); L=sum(i=1,#M,(-1)^(i-1)*(M-M^0)^i/i);return(if(n
Comments