[seqfan] counting matrices by column rises

[Neil Sloane]

Dear SeqFans, I just discovered this interesting paper:
Abramson, Morton; Promislow, David. Enumeration of arrays by column rises.
J. Combinatorial Theory Ser. A 24 (1978), no. 2, 247--250. MR0469773 (57
#9554),
which led me to add A212805 and A212806 - the latter needs more terms. Ron?

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Neil J. A. Sloane, President, OEIS Foundation
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