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A101259 Numbers n whose deficiency is 54. 0
87, 195, 244, 495, 11584, 35595, 137452847104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No more elements found up to 2*10^7. - Stefan Steinerberger, Feb 04 2006

LINKS

Table of n, a(n) for n=1..7.

V. K. Tintschev, Cofacient Numbers.

EXAMPLE

87 is a term of the sequence because 3*29 = 87 and 87 - 29 - 3 = g(87) = 55 [see Tintschev link].

MATHEMATICA

Do[ If[ DivisorSigma[1, n] + 54 == 2n, Print[n]], {n, 10^7}] (* Robert G. Wilson v, Dec 22 2004 *)

PROG

(MAGMA) [n: n in [1..2*10^7] | DivisorSigma(1, n)+54 eq 2*n]; // Vincenzo Librandi, Jul 30 2015

CROSSREFS

Cf. A101223.

Sequence in context: A044800 A067749 A063349 * A063336 A129515 A133524

Adjacent sequences:  A101256 A101257 A101258 * A101260 A101261 A101262

KEYWORD

nonn,more

AUTHOR

Vassil K. Tintschev (tinchev(AT)sunhe.jinr.ru), Dec 17 2004

EXTENSIONS

a(7) from Donovan Johnson, Dec 23 2008

STATUS

approved

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Last modified December 2 05:20 EST 2020. Contains 338865 sequences. (Running on oeis4.)