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A121459 Let sqr[n] = A004001[n]^2 - A005185[n]^2. Then a(n) =sqr[Abs[sqr[n - 1]]] + sqr[Abs[n - sqr[n - 1]]] 0
0, -3, -14, -18, -7, -9, -47, -51, 0, -15, -15, -48, -17, -36, 57, -151, 0, -63, 0, -11, 0, 25, 26, 368, 29, -5, -96, -33, 0, -144, 16927, -466, -180, 9033, 10192, 0, -43, 316, 0, 0, 47, -302, 49, 152, 1122, 945, 9145, 71914, 8041, 9591, 121, 54, 23142, 0, 177, 12813, 1665, -5, 3255, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Self-referencing chaotic recursion squared sequence using A005185 and A004001.

LINKS

Table of n, a(n) for n=1..60.

MATHEMATICA

Conway[0] = Conway[1] = 1; Conway[n_Integer?Positive] := Conway[n] = Conway[Conway[n - 1]] + Conway[n - Conway[n - 1]] Hofstadter[n_Integer?Positive] := Hofstadter[n] = Hofstadter[n - Hofstadter[n - 1]] + Hofstadter[n - Hofstadter[n - 2]] Hofstadter[0] = Hofstadter[1] = 1; sqr[n_] := sqr[n] = Conway[n]^2 - Hofstadter[n]^2 a = Table[sqr[Abs[sqr[n - 1]]] + sqr[Abs[n - sqr[n - 1]]], {n, 1, 60}]

CROSSREFS

Cf. A004001, A005185.

Sequence in context: A032920 A134767 A022125 * A121226 A063633 A108933

Adjacent sequences:  A121456 A121457 A121458 * A121460 A121461 A121462

KEYWORD

sign

AUTHOR

Roger L. Bagula, Sep 06 2006

EXTENSIONS

Edited by N. J. A. Sloane, Oct 01 2006

STATUS

approved

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Last modified October 19 03:19 EDT 2018. Contains 316327 sequences. (Running on oeis4.)