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A090165 Number of configurations of Sam Loyd's sliding block 15-puzzle that require a minimum of n moves to be reached, starting with the empty square at one of the 8 non-corner boundary squares. +0
4
1, 3, 6, 14, 32, 66, 134, 280, 585, 1214, 2462, 4946, 9861, 19600, 38688, 76086, 148435 (list; graph; listen)
OFFSET

0,2

PROGRAM

See link in A089473.

CROSSREFS

Cf. A087725, A089473, A089484, A090164, A090378.

Adjacent sequences: A090162 A090163 A090164 this_sequence A090166 A090167 A090168

Sequence in context: A106803 A006356 A077998 this_sequence A129954 A114945 A003477

KEYWORD

fini,more,nonn

AUTHOR

Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 27 2003

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.


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