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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
OFFSET
1,1
COMMENTS
Numbers n for which A051135(n) = 3.
LINKS
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.
Sequence in context: A281264 A372237 A366869 * A030553 A304567 A154493
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 18 2016
STATUS
approved