A204260 - OEIS

A204260

Symmetric matrix given by f(i,j)=ceiling(i*j/(i+j)) .

1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 2, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 1, 1, 2, 2, 3, 3, 2, 2, 1, 1, 2, 3, 3, 3, 3, 3, 2, 1, 1, 2, 3, 3, 3, 3, 3, 3, 2, 1, 1, 2, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 2, 3, 3, 4, 4, 4, 4, 3, 3, 2, 1, 1, 2, 3, 3, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 2, 3, 3, 4, 4, 4, 4

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OFFSET

1,8

LINKS

Table of n, a(n) for n=1..99.

EXAMPLE

Northwest corner:

1 1 1 1 1 1 1 1

1 1 2 2 2 2 2 2

1 2 2 2 2 2 3 3

1 2 2 2 3 3 3 3

1 2 2 3 3 3 3 4