A083179 a(1)=1, a(n) = smallest positive integer not included earlier such that the partial sums of a(A000040) are prime and the partial sums of a(A002808) are composite.

1, 2, 3, 4, 6, 5, 8, 7, 9, 10, 12, 11, 16, 14, 15, 13, 20, 17, 22, 18, 19, 23, 24, 21, 26, 25, 27, 28, 36, 29, 30, 31, 32, 33, 34, 35, 44, 38, 37, 39, 40, 42, 48, 43, 41, 45, 56, 46, 47, 49, 50, 51, 52, 53, 54, 55, 57, 59, 60, 58, 62, 61, 63, 64, 65, 67, 66, 68, 69, 71, 70, 72

Offset

1,2

Links

Table of n, a(n) for n=1..72.

Example

a(2) = 2 is prime a(2) +a(3) +a(5) = 2 +3 +6 = 11.
a(4) = 4 is composite, a(4) +a(6) +a(8) + a(9) = 4 +5 + 7+ 9 = 25 is composite.

Crossrefs

Cf. A083180, A083181.

Cf. A073885.

Sequence in context: A129258 A256988 A104650 * A123503 A123717 A123718

Adjacent sequences: A083176 A083177 A083178 * A083180 A083181 A083182

Keyword

nonn

Author

Amarnath Murthy, Apr 26 2003

Extensions

More terms from David Wasserman, Oct 26 2004

Status

approved