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A294937 Characteristic function for abundant numbers (A005101): a(n) = 1 if A001065(n) > n, 0 otherwise. 13
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16384

Index entries for characteristic functions

Index entries for sequences related to sums of divisors

FORMULA

a(n) = 1 if A033880(n) > 0, 0 otherwise.

a(n) = 1 - A294935(n).

CROSSREFS

Cf. A001065, A033880, A294934, A294935, A294936.

Cf. A005101 (positions of ones), A263837 (of zeros).

Sequence in context: A277163 A297041 A294930 * A277156 A297040 A185705

Adjacent sequences:  A294934 A294935 A294936 * A294938 A294939 A294940

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 12 2017

STATUS

approved

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Last modified November 12 13:36 EST 2018. Contains 317109 sequences. (Running on oeis4.)