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A104074 a(1)=1. a(n) = a(n-1) + (number of terms, from among terms a(1) through a(n-1), which divide sum{k=1 to n-1} a(k)). 1
1, 2, 3, 6, 10, 12, 14, 19, 20, 22, 23, 29, 31, 36, 42, 47, 48, 49, 54, 60, 67, 68, 70, 71, 77, 78, 79, 83, 85, 90, 98, 100, 105, 107, 109, 111, 116, 118, 130, 133, 134, 135, 137, 140, 141, 144, 146, 153, 155, 161, 162, 164, 165, 170, 175, 176, 178, 179, 184, 186, 188 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..61.

EXAMPLE

The sum of the first 7 terms of the sequence is 48. There are 5 terms from among the first 7 terms which divide 48. (Those terms are a(1)=1, a(2)=2, a(3)=3, a(4)=6, a(6)=12). So a(8) = a(7) + 5 = 19.

CROSSREFS

Sequence in context: A106172 A189478 A090695 * A140785 A038775 A065029

Adjacent sequences:  A104071 A104072 A104073 * A104075 A104076 A104077

KEYWORD

nonn

AUTHOR

Leroy Quet, Jun 24 2007

EXTENSIONS

Corrected and extended by Joshua Zucker, Jul 18 2007

STATUS

approved

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Last modified August 2 08:47 EDT 2021. Contains 346422 sequences. (Running on oeis4.)