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 A091387 Aronson's mod 13 sequence: "T is the first, fourth, eleventh, third, ... letter in this sentence, not counting spaces or commas and all mod 13". 4
 1, 4, 11, 3, 11, 0, 11, 4, 12, 5, 7, 12, 4, 11, 0, 5, 11, 6, 12, 4, 12, 4, 6, 11, 4, 6, 11, 4, 9, 4, 10, 2, 10, 3, 8, 1, 3, 6, 1, 4, 6, 2, 8, 9, 4, 10, 2, 7, 6, 11, 4, 6, 9, 9, 1, 9, 2, 7, 12, 4, 10, 1, 1, 3, 8, 1, 3, 6, 12, 4, 5, 1, 7, 8, 3, 5, 10, 3, 8, 1, 7, 0, 2, 10, 12, 2, 4, 0, 6, 12, 5, 0, 3, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Infinite? Periodic? It seems the answers are "Yes and No" because many numbers (such as "tenth") have multiple T's and moreover, in many of these, the T's are spread such that at least one of them will be != 2 mod 13 (2 is important because "second" is the only T-less word) REFERENCES A. J. Aronson, quoted by D. R. Hofstadter in Metamagical Themas, Basic Books, NY, 1985, p. 44. LINKS B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence, J. Integer Seqs., Vol. 6 (2003), #03.2.2. CROSSREFS Cf. A005224, A091388, A091389, A091390, A091391. Sequence in context: A230870 A115642 A115643 * A091388 A269742 A151873 Adjacent sequences:  A091384 A091385 A091386 * A091388 A091389 A091390 KEYWORD easy,nonn,word AUTHOR Sam Alexander, Jan 05 2004 STATUS approved

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)