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A132943
Concatenation of first n imperfect numbers.
2
1, 12, 123, 1234, 12345, 123457, 1234578, 12345789, 1234578910, 123457891011, 12345789101112, 1234578910111213, 123457891011121314, 12345789101112131415, 1234578910111213141516, 123457891011121314151617
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..16.
Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.
CROSSREFS
Imperfect numbers: A132999. Cf. A000396, A007908, A019518, A132928.
Sequence in context: A057932 A262578 A262577 * A262576 A362119 A262575
Adjacent sequences: A132940 A132941 A132942 * A132944 A132945 A132946
KEYWORD
easy,nonn,base
AUTHOR
Omar E. Pol, Oct 16 2007
STATUS
approved

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Last modified November 29 00:35 EST 2024. Contains 378208 sequences.
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