1,2

More information

a(n) = (n^2)/2 + O(n)

a(3) = 6 because a ship has 6 cells and no other 3 X 3 stable pattern has more.

Sequence in context: A095299 A141641 A079250 this_sequence A049421 A039624 A083166

Adjacent sequences: A055394 A055395 A055396 this_sequence A055398 A055399 A055400

nonn

Stephen A. Silver (maths(AT)argentum.freeserve.co.uk), Jun 25 2000