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 A023133 Signature sequence of Pi (arrange the numbers i+j*x (i,j >= 1) in increasing order; the sequence of i's is the signature of x). 4
 1, 2, 3, 4, 1, 5, 2, 6, 3, 7, 4, 1, 8, 5, 2, 9, 6, 3, 10, 7, 4, 1, 11, 8, 5, 2, 12, 9, 6, 3, 13, 10, 7, 4, 1, 14, 11, 8, 5, 2, 15, 12, 9, 6, 3, 16, 13, 10, 7, 4, 1, 17, 14, 11, 8, 5, 2, 18, 15, 12, 9, 6, 3, 19, 16, 13, 10, 7, 4, 1, 20, 17, 14, 11, 8, 5, 2, 21, 18, 15, 12, 9, 6, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES C. Kimberling, "Fractal Sequences and Interspersions", Ars Combinatoria, vol. 45 p 157 1997. LINKS T. D. Noe, Table of n, a(n) for n=1..1000 C. Kimberling, Interspersions PROG (PARI) lista(nn) = {v = vector(nn^2, k, kij = k+nn-1; i = 1+(kij % nn); j = kij\nn; i+j*Pi); vs = vecsort(v, , 1); for (k=1, #vs, print1(curi = 1+((vs[k]+nn-1) % nn), ", "); if (curi == nn, break)); } \\ Michel Marcus, Apr 10 2015 CROSSREFS Cf. A001840, A008810. Sequence in context: A238326 A083480 A179547 * A026280 A115994 A276951 Adjacent sequences:  A023130 A023131 A023132 * A023134 A023135 A023136 KEYWORD nonn AUTHOR STATUS approved

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Last modified September 20 17:16 EDT 2020. Contains 337265 sequences. (Running on oeis4.)