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A115722 Table of Durfee square of partitions in Mathematica order. +0
5
0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2 (list; graph; listen)
OFFSET

0,10

LINKS

Eric Weisstein's World of Mathematics, Durfee Square.

FORMULA

If partition is laid out in descending order p(1),p(2),...,p(k) without repetition factors (e.g. [3,2,2,1,1,1]), a(P) = max_k min(k,p(k)).

EXAMPLE

First few rows: 0; 1,1; 1,1,1; 1,1,2,1,1; 1,1,2,1,2,1,1

CROSSREFS

Cf. A115721, A115994, A115720, A080577.

Row lengths A000041, totals A115995.

Sequence in context: A080028 A143223 A063993 this_sequence A115721 A138330 A128591

Adjacent sequences: A115719 A115720 A115721 this_sequence A115723 A115724 A115725

KEYWORD

nonn,tabf

AUTHOR

Frank Adams-Watters (FrankTAW(AT)Netscape.net), Mar 11 2006

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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