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Search: id:A042983
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A042983 Borris numbers: n>99 with following property: form a sequence whose initial terms are the t digits of n, later terms given by rule b(i+1)=b(i)+product of t-1 previous terms; then n itself appears in the sequence. +0
2
205, 302, 1220, 1757, 3505, 4484, 59445, 80005, 99543, 393544, 1545283, 31593249, 33252489, 184577126 (list; graph; listen)
OFFSET

0,1

EXAMPLE

1757 is a 4-digit Borris number since sequence is 1,7,5,7,1*7*5+7=42,7*5*7+42=287,5*7*42+287=1757.

CROSSREFS

Sequence in context: A099105 A072573 A116177 this_sequence A020170 A015974 A077457

Adjacent sequences: A042980 A042981 A042982 this_sequence A042984 A042985 A042986

KEYWORD

nonn,base

AUTHOR

Denis Borris (borrisd(AT)magi.com)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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