A267103 Row 3 of A265903; numbers that occur exactly three times in A004001.

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

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: A281264 A372237 A366869 * A030553 A304567 A154493

Adjacent sequences: A267100 A267101 A267102 * A267104 A267105 A267106

Keyword

nonn

Author

Antti Karttunen, Jan 18 2016

Status

approved