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A070872 Numbers n such that A070871(n) = n. 3
1, 2, 6, 66, 216, 1159, 2184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Could be called nutritionally balanced numbers.

LINKS

Table of n, a(n) for n=1..7.

MATHEMATICA

a[0] = 1; a[n_] := a[n] = If[ OddQ[n], a[n/2 - 1/2], a[n/2] + a[n/2 - 1]]; Do[ If[ a[n]*a[n - 1] == n, Print[n]], {n, 1, 5*10^6}]

CROSSREFS

Cf. A002487.

Sequence in context: A193609 A061999 A066756 * A055685 A262047 A280393

Adjacent sequences:  A070869 A070870 A070871 * A070873 A070874 A070875

KEYWORD

nonn

AUTHOR

J. H. Conway, May 17 2002

EXTENSIONS

More terms from David W. Wilson, May 17 2002

STATUS

approved

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Last modified May 16 02:09 EDT 2022. Contains 353687 sequences. (Running on oeis4.)