2,4

R. K. Guy, Unsolved Problems Number Theory, E37.

R. K. Guy and R. J. Nowakowski, ``Mousetrap,'' in D. Miklos, V.T. Sos and T. Szonyi, eds., Combinatorics, Paul Erdos is Eighty. Bolyai Society Math. Studies, Vol. 1, pp. 193-206, 1993.

Mundfrom, Daniel J.; A problem in permutations: the game of `Mousetrap'. European J. Combin. 15 (1994), no. 6, 555-560.

A. Steen, Some formulae respecting the game of mousetrap, Quart. J. Pure Applied Math., 15 (1878), 230-241.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Cf. A002468, A002467, A028306, etc.

Adjacent sequences: A002466 A002467 A002468 this_sequence A002470 A002471 A002472

Sequence in context: A014987 A108079 A084235 this_sequence A092636 A007197 A002649

nonn,nice

njas