The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A364562 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A364562

Numbers k for which A156552(k) > k.
(history; published version)

#7 by Michael De Vlieger at Sat Jul 29 14:36:56 EDT 2023

STATUS

proposed

approved

#6 by Antti Karttunen at Sat Jul 29 13:38:28 EDT 2023

STATUS

editing

proposed

#5 by Antti Karttunen at Sat Jul 29 12:54:30 EDT 2023

CROSSREFS

Positions of strictly positive terms in A364559.

#4 by Antti Karttunen at Fri Jul 28 15:07:06 EDT 2023

COMMENTS

If k is a term, then also 2*k is present in this sequence, and vice versa.

#3 by Antti Karttunen at Fri Jul 28 14:31:37 EDT 2023

COMMENTS

Numbers k such that A005941(k) > k.

#2 by Antti Karttunen at Fri Jul 28 14:29:20 EDT 2023

NAME

allocated Numbers k for Antti Karttunenwhich A156552(k) > k.

DATA

7, 11, 13, 14, 17, 19, 22, 23, 26, 28, 29, 31, 33, 34, 37, 38, 39, 41, 43, 44, 46, 47, 51, 52, 53, 56, 57, 58, 59, 61, 62, 65, 66, 67, 68, 69, 71, 73, 74, 76, 78, 79, 82, 83, 85, 86, 87, 88, 89, 92, 93, 94, 95, 97, 101, 102, 103, 104, 106, 107, 109, 111, 112, 113, 114, 115, 116, 117, 118, 119, 122, 123, 124, 127

OFFSET

1,1

PROG

(PARI)

A156552(n) = { my(f = factor(n), p, p2 = 1, res = 0); for(i = 1, #f~, p = 1 << (primepi(f[i, 1]) - 1); res += (p * p2 * (2^(f[i, 2]) - 1)); p2 <<= f[i, 2]); res };

isA364562(n) = (A156552(n) > n);

CROSSREFS

Cf. A005941, A156552, A364560 (complement).

KEYWORD

allocated

nonn

AUTHOR

Antti Karttunen, Jul 28 2023

STATUS

approved

editing

#1 by Antti Karttunen at Fri Jul 28 14:23:15 EDT 2023

NAME

allocated for Antti Karttunen

KEYWORD

allocated

STATUS

approved