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A195185 Inverse permutation of A195184; every positive integer occurs exactly once. 3
1, 2, 3, 4, 5, 6, 10, 7, 8, 9, 14, 11, 12, 13, 15, 21, 19, 16, 17, 18, 20, 27, 25, 22, 23, 24, 26, 28, 36, 34, 32, 29, 30, 31, 33, 35, 45, 44, 42, 40, 37, 38, 39, 41, 43, 55, 54, 53, 51, 49, 46, 47, 48, 50, 52, 65, 64, 63, 61, 59, 56, 57, 58, 60, 62, 66, 78, 76, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

MATHEMATICA

p[n_] := If[PrimeQ[n], n, 1]

Table[p[n], {n, 1, 90}]  (* A089026 *)

g[1] = {1}; g[n_] := Insert[g[n - 1], n, p[n]]

f[1] = g[1]; f[n_] := Join[f[n - 1], g[n]]

f[20] (* A195183 *)

row[n_] := Position[f[30], n];

u = TableForm[Table[row[n], {n, 1, 5}]]

v[n_, k_] := Part[row[n], k];

w = Flatten[Table[v[k, n - k + 1], {n, 1, 13},

  {k, 1, n}]]  (* A195184 *)

q[n_] := Position[w, n]; Flatten[

Table[q[n], {n, 1, 80}]]  (* A195185 *)

CROSSREFS

Cf. A195183, A195184, A089026, A194959.

Sequence in context: A136683 A200332 A303953 * A194843 A194913 A194864

Adjacent sequences:  A195182 A195183 A195184 * A195186 A195187 A195188

KEYWORD

nonn

AUTHOR

Clark Kimberling, Sep 10 2011

STATUS

approved

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Last modified December 8 17:01 EST 2021. Contains 349596 sequences. (Running on oeis4.)