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A267103 Row 3 of A265903; numbers that occur exactly three times in A004001. 3
4, 15, 27, 30, 48, 54, 57, 61, 86, 96, 102, 105, 112, 115, 119, 124, 157, 172, 182, 188, 191, 202, 208, 211, 218, 221, 225, 233, 236, 240, 245, 251, 293, 314, 329, 339, 345, 348, 364, 374, 380, 383, 394, 400, 403, 410, 413, 417, 429, 435, 438, 445, 448, 452, 460, 463, 467, 472, 481, 484, 488, 493, 499, 506, 558 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n for which A051135(n) = 3.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..8192

FORMULA

a(n) = A087686(1+A266109(n)) = A087686(1+A087686(1+A188163(n))).

PROG

(Scheme, two implementations, the latter requiring also Antti Karttunen's IntSeq-library)

(define (A267103 n) (A087686 (+ 1 (A266109 n))))

(define A267103 (MATCHING-POS 1 1 (lambda (n) (= 3 (A051135 n)))))

CROSSREFS

Column 3 of A265901, row 3 of A265903.

Cf. A004001, A051135, A087686, A188163, A266109.

Sequence in context: A061873 A017437 A281264 * A030553 A304567 A154493

Adjacent sequences:  A267100 A267101 A267102 * A267104 A267105 A267106

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 18 2016

STATUS

approved

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Last modified June 23 07:38 EDT 2021. Contains 345395 sequences. (Running on oeis4.)