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2,1
Here, an average array is an array of positive numbers such that each number is the average of the numbers in its horizontally and vertically adjacent cells.
Table of n, a(n) for n=2..15.
Erich Friedman, Problem of the month March 1999
Sequence in context: A317637 A131769 A055832 * A100175 A063489 A299284
Adjacent sequences: A195750 A195751 A195752 * A195754 A195755 A195756
nonn
Kausthub Gudipati, Sep 23 2011
approved