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, 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

Offset

1,2

Links

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

Crossrefs

Cf. A088637.

Sequence in context: A183004 A163120 A051350 * A333675 A051349 A048217

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