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A161600 Nonprime numbers such that TITO(n) = n, where TITO(n) = A161594(n). 8
1, 4, 6, 8, 9, 22, 26, 33, 39, 44, 46, 55, 62, 66, 69, 77, 82, 86, 88, 93, 99, 121, 143, 169, 187, 202, 206, 226, 242, 252, 253, 262, 286, 299, 303, 309, 339, 341, 343, 363, 393, 404, 422, 446, 451, 466, 473, 482, 484, 505, 525, 583, 606, 616, 622, 626, 633, 662, 669, 671, 682, 686 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

T. Khovanova, Turning Numbers Inside Out [From Tanya Khovanova, Jul 07 2009]

MATHEMATICA

reversepower[{n_, k_}] := FromDigits[Reverse[IntegerDigits[n]]]^k; f[n_] := FromDigits[Reverse[IntegerDigits[Times @@ Map[reversepower, FactorInteger[n]]]]]; Select[Range[600], f[#] == # && ! PrimeQ[#] &]

PROG

(Haskell)

a161600 n = a161600_list !! (n-1)

a161600_list = filter ((== 0) . a010051) a161597_list

-- Reinhard Zumkeller, Oct 14 2011

(PARI) is(n)=!isprime(n)&&n==A161594(n) \\ M. F. Hasler, May 11 2015

CROSSREFS

Cf. A010051, A161594; subsequence of A161597.

Sequence in context: A121719 A267509 A162738 * A032350 A078337 A046351

Adjacent sequences: A161597 A161598 A161599 * A161601 A161602 A161603

KEYWORD

nonn,base

AUTHOR

J. H. Conway & Tanya Khovanova, Jun 14 2009

EXTENSIONS

Edited by N. J. A. Sloane, Jun 23 2009

Offset corrected by Reinhard Zumkeller, Oct 14 2011

Minor edits and more displayed terms from M. F. Hasler, May 11 2015

STATUS

approved

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Last modified December 9 18:17 EST 2022. Contains 358703 sequences. (Running on oeis4.)