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 A141560 Nonprimes of form (p(n)-r(n)), where A141468(n)=r(n)=n-th nonprime and p(n)=n-th prime. 0
 1, 1, 4, 9, 14, 15, 21, 22, 25, 34, 35, 40, 50, 55, 62, 65, 65, 68, 69, 86, 91, 91, 100, 106, 111, 118, 123, 124, 133, 133, 135, 136, 147, 158, 161, 161, 164, 169, 169, 177, 182, 187, 192, 200, 201, 209, 222, 225, 226, 246, 255, 256, 259, 264, 275, 280, 287, 296 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE If n=1, then p(1)-r(1)=2-0=2 (prime). If n=2, then p(2)-r(2)=3-1=2 (prime). If n=3, then p(3)-r(3)=5-4=1=a(1). If n=4, then p(4)-r(4)=7-6=1=a(2). If n=5, then p(5)-r(5)=11-8=3 (prime). If n=6, then p(6)-r(6)=13-9=4=a(3). If n=7, then p(7)-r(7)=17-10=7 (prime). If n=8, then p(8)-r(8)=19-12=7 (prime). If n=9, then p(9)-r(9)=23-14=9=a(4). If n=10, then=p(10)-r(10)=29-15=14=a(5). If n=11, then p(11)-r(11)=31-16=15=a(6). If n=12, then p(12)-r(12)=37--18=19 (prime). If n=13, then p(13)-r(13)=41-20=21=a(7). If n=14, then p(14)-r(14)=43-21=22=a(8). If n=15, then p(15)-r(15)=47-22=25=a(9). If n=16, then p(16)-r(16)=53-24=29 (prime). If n=17, then p(17)-r(17)=59-25=34=a(10), etc. CROSSREFS Cf. A000040, A141468. Sequence in context: A279230 A244037 A091880 * A071864 A312987 A050986 Adjacent sequences:  A141557 A141558 A141559 * A141561 A141562 A141563 KEYWORD nonn AUTHOR Juri-Stepan Gerasimov, Aug 14 2008 EXTENSIONS Edited, corrected and extended by Ray Chandler, Aug 19 2008 STATUS approved

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Last modified March 30 09:22 EDT 2020. Contains 333125 sequences. (Running on oeis4.)