A018221 - OEIS

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A018221

Row 2 of A018219, i.e., (2,n,a_n) is a winning position.

0

1, 0, 6, 8, 10, 12, 2, 7, 3, 11, 4, 9, 5, 16, 24, 23, 13, 26, 29, 34, 32, 35, 40, 15, 14, 38, 17, 47, 44, 18, 53, 48, 20, 52, 19, 21, 57, 65, 25, 61, 22, 66, 69, 67, 28, 71, 78, 27, 31, 79, 84, 82, 33, 30, 83, 90, 89, 36, 99, 95, 97, 39, 100, 103, 107, 37, 41, 43, 110, 42

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OFFSET

0,3

COMMENTS

Self-inverse when considered as a permutation or function, i.e., a(a(n)) = n.

LINKS

Table of n, a(n) for n=0..69.

Index entries for sequences that are permutations of the natural numbers

CROSSREFS

Sequence in context: A138890 A189082 A171562 * A071278 A079772 A080731

Adjacent sequences: A018218 A018219 A018220 * A018222 A018223 A018224

KEYWORD

nonn

AUTHOR

EXTENSIONS

Edited and extended by Christian G. Bower, Oct 29 2002

STATUS

approved