Square array read by antidiagonals up. Redheffer type matrix. A007427 interleaved with k-1 zeros in the columns.
1, 2, 1, 2, 1, 1, 1, 0, 0, 1, 2, 2, 1, 0, 1, 4, 0, 0, 0, 0, 1, 2, 2, 0, 1, 0, 0, 1, 0, 0, 2
1 seqfan posts
Wed Dec 16 17:02:44 CET 2009 [seqfan] Divisibility sequences