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A088638 a(1) = 1, a(n+1) = a(n)+ smallest composite number not added earlier if a(n) is noncomposite else a(n+1) = a(n) + the smallest prime not added earlier. 1
1, 5, 11, 19, 28, 30, 33, 38, 45, 56, 69, 86, 105, 128, 157, 167, 179, 193, 208, 239, 255, 292, 333, 376, 423, 476, 535, 596, 663, 734, 807, 886, 969, 1058, 1155, 1256, 1359, 1466, 1575, 1688, 1815, 1946, 2083, 2101, 2240, 2389, 2409, 2560, 2717, 2880, 3047 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..51.

CROSSREFS

Cf. A088637.

Sequence in context: A183004 A163120 A051350 * A051349 A048217 A132087

Adjacent sequences:  A088635 A088636 A088637 * A088639 A088640 A088641

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Oct 26 2003

EXTENSIONS

More terms from David Wasserman, Aug 16 2005

STATUS

approved

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Last modified December 14 15:08 EST 2019. Contains 329979 sequences. (Running on oeis4.)