3,1

Here, an average array is an array with positive integers such that each number is the average of the numbers in its horizontally, vertically and diagonally adjacent cells.

Table of n, a(n) for n=3..15.

Erich Friedman, Problem of the month March 1999

Sequence in context: A231805 A122272 A330650 * A184610 A106322 A035762

Adjacent sequences: A195807 A195808 A195809 * A195811 A195812 A195813

nonn

Kausthub Gudipati, Sep 24 2011

approved