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 A174215 First differences of A174214. 3
 2, 1, 1, 1, 1, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 1, 1, 1, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 9,1 COMMENTS If a(n) is odd, then it is 1 or prime; if a(n) is even, then 2+a(n)/2 is prime. LINKS V. Shevelev, Theorems on twin primes-dual case, arXiv:0912.4006 FORMULA a(n) = A174214(n+1)-A174214(n). CROSSREFS Cf. A167495, A166945, A174214 Sequence in context: A124341 A275062 A247005 * A305567 A134744 A260875 Adjacent sequences:  A174212 A174213 A174214 * A174216 A174217 A174218 KEYWORD nonn,easy AUTHOR Vladimir Shevelev, Mar 12 2010 EXTENSIONS Terms corrected, using the Mathar-Layman corrections of A174214, by Vladimir Shevelev, Mar 26 2010 STATUS approved

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Last modified October 19 02:41 EDT 2019. Contains 328211 sequences. (Running on oeis4.)