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A129146 a(n) = n-th odd prime minus n-th odd composite number. 2
-6, -10, -14, -14, -14, -16, -16, -16, -16, -18, -14, -14, -14, -16, -12, -10, -14, -10, -10, -12, -8, -8, -4, 2, 2, -2, -4, -6, -4, 8, 10, 14, 14, 20, 18, 22, 22, 24, 28, 32, 28, 36, 34, 36, 34, 42, 52, 52, 52, 50, 54, 54, 62, 62, 62, 66, 66, 70, 72, 70, 78, 90, 92, 92, 92, 100, 102, 110, 106, 108, 112, 118, 120, 124, 124, 128 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For small n's, n-th odd prime less than n-th odd composite number, while for large n's, n-th odd prime larger than n-th odd composite number).

LINKS

Table of n, a(n) for n=1..76.

FORMULA

a(n) = A065091(n)-A071904(n).

CROSSREFS

Cf. A065091, A071904, A129131, A129145.

Sequence in context: A088706 A087710 A163504 * A315158 A315159 A063774

Adjacent sequences:  A129143 A129144 A129145 * A129147 A129148 A129149

KEYWORD

sign

AUTHOR

Zak Seidov, Apr 01 2007

STATUS

approved

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Last modified June 24 16:51 EDT 2021. Contains 345417 sequences. (Running on oeis4.)