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Search: id:A071761
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| A071761 |
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Dealing cards in a game of solitaire. |
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+0
2
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| 0, 1, 2, 21, 31, 32, 321, 421, 431, 432, 4321, 5321, 5421, 5431, 5432, 54321, 64321, 65321, 65421, 65431, 65432, 654321, 754321, 764321, 765321, 765421, 765431, 765432, 7654321, 8654321, 8754321, 8764321, 8765321, 8765421, 8765431, 8765432
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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An infinite square array,
a11 a12 a13 ...
a21 a22 a23 ...
a31 a32 a33 ...
a41 a42 a43 ...
...............
is built up by antidiagonals: a11 a21 a12 a31 a22 a13 ... The terms of the sequence record the number of entries in each column at each step, e.g. when dealing cards in a game of solitaire.
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CROSSREFS
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The parity of this sequence gives A023532.
Cf. A071762, A074909.
Sequence in context: A042565 A079907 A075715 this_sequence A101316 A006920 A089558
Adjacent sequences: A071758 A071759 A071760 this_sequence A071762 A071763 A071764
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KEYWORD
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nonn,easy,nice
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AUTHOR
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Allan C. Wechsler (acw(AT)alum.mit.edu), Jun 07 2002
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EXTENSIONS
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Entry revised by Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Dec 08, 2004
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