1,1

Table of n, a(n) for n=1..10.

Dmitry Kamenetsky, The first 10 solutions

Dmitry Kamenetsky, All numbers in a 5x5 Minesweeper grid</a, Puzzling StackExchange, September 2019.

Wikipedia, Minesweeper.

Sequence in context: A254274 A068001 A213443 * A242963 A191846 A068213

Adjacent sequences: A302977 A302978 A302979 * A302981 A302982 A302983

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Dmitry Kamenetsky, Apr 16 2018

approved