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A246352 Numbers n such that A048673(n) >= n. 10
1, 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 26, 27, 28, 30, 32, 33, 35, 36, 39, 40, 42, 44, 45, 48, 49, 50, 52, 54, 56, 57, 60, 63, 64, 66, 68, 69, 70, 72, 75, 76, 78, 80, 81, 84, 88, 90, 91, 92, 93, 96, 98, 99, 100, 102, 104, 105, 108, 110, 112, 114, 116, 117, 120, 124, 125, 126, 128, 130, 132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

PROG

(PARI)

default(primelimit, 2^22);

A003961(n) = my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); \\ From Michel Marcus

A048673(n) = (A003961(n)+1)/2;

isA246352(n) = (A048673(n) >= n);

n = 0; i = 0; while(i < 10000, n++; if(isA246352(n), i++; write("b246352.txt", i, " ", n)));

(Scheme, with Antti Karttunen's IntSeq-library)

(define A246352 (MATCHING-POS 1 1 (lambda (n) (>= (A048673 n) n))))

CROSSREFS

Complement: A246351

Union of A246282 and A048674.

Subsequence: A029744 (gives the positions of records in A048673).

Cf. A246372.

Sequence in context: A106577 A068577 A225731 * A225730 A256389 A225729

Adjacent sequences:  A246349 A246350 A246351 * A246353 A246354 A246355

KEYWORD

nonn

AUTHOR

Antti Karttunen, Aug 24 2014

STATUS

approved

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Last modified November 15 08:37 EST 2019. Contains 329144 sequences. (Running on oeis4.)