References to A161780

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

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
Links to OEIS content are included according to The OEIS End-User License Agreement .