This sequence is the row sum of differences between two tables. Might be relevant to the matrix inverse of a triangular table.
Table of n, a(n) for n=1..13.
Sequence in context: A300531 A097163 A117186 * A001851 A303963 A304349
Adjacent sequences: A155039 A155040 A155041 * A155043 A155044 A155045
Mats Granvik, Jan 19 2009