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A153826
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Index sequence to A089840: positions of bijections that preserve A127301 (the non-oriented form of general trees).
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7
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0, 2, 22, 23, 24, 25, 26, 91, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 395, 531, 634, 876, 1005, 1109, 1228, 1229, 1230, 1231, 1232, 1704, 3608, 3611, 3613, 3615, 3617, 4392
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| These elements form a subgroup in A089840 (A089839). Because A127301 can be computed as a fold and most of the recursive derivations of A089840 (i.e. tables A122201-A122204, A122283-A122290, A130400-A130403) are also folds, this sequence gives also the indices to those derived tables where bijections preserving A127301 occur.
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LINKS
| A. Karttunen, Table of n, a(n) for n = 0..2129
A. Karttunen, C-program for computing the initial terms of this sequence
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CROSSREFS
| Subset of A153827. Apart from 0, has no other elements common with A153829. Cf. also A153828, A153830, A153831, A153832, A153833.
Sequence in context: A083764 A141236 A079032 * A080283 A080433 A022373
Adjacent sequences: A153823 A153824 A153825 * A153827 A153828 A153829
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KEYWORD
| nonn
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AUTHOR
| Antti Karttunen (His_Firstname.His_Surname(AT)gmail.com), Jan 07 2009
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