0,2
Equals the odd bisection of A102917. Triangle A102098 shifts each column up 1 row under matrix cube.
(PARI) {a(n)=local(A=matrix(2, 2), B); A[1, 1]=1; for (m=2, n+1, B=matrix(m, m); for (i=1, m, for (j=1, i, if(j==i, B[i, j]=j, if(j==1, B[i, j]=(A^3)[i-1, 1], B[i, j]=(A^3)[i-1, j])); )); A=B); return((A^2)[n+1, 2])}
Cf. A102920, A102098, A102917.
Sequence in context: A013108 A173945 A111846 * A139688 A197356 A072445
Adjacent sequences: A102919 A102920 A102921 * A102923 A102924 A102925
nonn
Paul D. Hanna (pauldhanna(AT)juno.com), Jan 21 2005
