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A054001 Differences between n such that n and n+1 have the same sum of divisors. 0
192, 751, 377, 30, 270, 1051, 289, 1390, 10477, 4032, 485, 787, 4812, 9041, 2568, 6252, 13746, 8101, 10253, 4908, 7, 4301, 8551, 16529, 2292, 5431, 5136, 16164, 9217, 13547, 1601, 4332, 7783, 16056, 3120, 7704, 28793, 44143, 14921, 58284 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

FORMULA

a(n) = A002961(n+1) - A002961(n)

MATHEMATICA

Differences[Select[Range[500000], DivisorSigma[1, #]== DivisorSigma[ 1, #+1]&]] (* Harvey P. Dale, Oct 16 2011 *)

CROSSREFS

Cf. A000203, A002961.

Sequence in context: A254847 A251083 A194647 * A051527 A305073 A101451

Adjacent sequences:  A053998 A053999 A054000 * A054002 A054003 A054004

KEYWORD

nonn

AUTHOR

Asher Auel (asher.auel(AT)reed.edu), Jan 12 2000

EXTENSIONS

More terms from David Wasserman, Mar 01 2002

STATUS

approved

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Last modified February 28 23:19 EST 2020. Contains 332353 sequences. (Running on oeis4.)