Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Column 1 of triangle A118040 (matrix square of A118032) equals A118042, the even-indexed bisection of this sequence. Column 1 of triangle A118045 equals A118047, the odd-indexed bisection of this sequence.
Table of n, a(n) for n=0..35.
Cf. A118032 (triangle), A118033 (column 0), A118035 (column 2); bisections: A118042 (even-indexed), A118047 (odd-indexed); related triangles: A118040 (A118032^2), A118045.
Sequence in context: A210669 A122026 A196721 * A096590 A068912 A164176
Adjacent sequences: A118031 A118032 A118033 * A118035 A118036 A118037
Paul D. Hanna, Apr 10 2006