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A080180 a(1)=1, a(n+1)=a(n)+spf(Sum(a(i): 1<=i<=n)), where spf=A020639 (smallest prime factor). 2
1, 2, 5, 7, 10, 15, 17, 20, 27, 29, 36, 49, 51, 320, 339, 341, 344, 1957, 1959, 1962, 1965, 1967, 13390, 13393, 13395, 13406, 13409, 13411, 13414, 13433, 13435, 145544, 145547, 145549, 145552, 145559, 145561, 146040, 146057, 146059, 146090, 146093 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n+1)=a(n)+spf(A080181(n)) for n>0.

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Cf. A080182.

Sequence in context: A018406 A018483 A018270 * A159942 A102339 A172410

Adjacent sequences:  A080177 A080178 A080179 * A080181 A080182 A080183

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 05 2003

STATUS

approved

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Last modified September 26 11:42 EDT 2022. Contains 356997 sequences. (Running on oeis4.)