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Search: id:A007573
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| A007573 |
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Number of asymmetric families of palindromic squares.
(Formerly M1319)
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+0
5
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| 1, 2, 5, 6, 9, 10, 10, 15, 15, 16, 18, 24, 18, 26
(list; graph; listen)
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OFFSET
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7,2
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REFERENCES
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M. Keith, Classification and enumeration of palindromic squares, J. Rec. Math., 22 (No. 2, 1990), 124-132.
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LINKS
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P. De Geest, Subsets of Palindromic Squares
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EXAMPLE
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Second term a(9)=2 indicates existence of two length 9 base numbers, 110091011 and 111091111.
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CROSSREFS
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Cf. A002778, A002779.
Adjacent sequences: A007570 A007571 A007572 this_sequence A007574 A007575 A007576
Sequence in context: A079256 A097685 A136369 this_sequence A143909 A139454 A028946
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KEYWORD
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nonn,base
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AUTHOR
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Simon Plouffe, N. J. A. Sloane (njas(AT)research.att.com), Robert G. Wilson v (rgwv(AT)rgwv.com)
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