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 A196007 Numbers n such that 90n + 83 is prime. 19
 0, 1, 2, 3, 4, 10, 12, 15, 16, 17, 21, 22, 23, 24, 25, 26, 29, 32, 36, 37, 39, 42, 45, 49, 50, 51, 54, 58, 59, 60, 61, 64, 67, 68, 71, 72, 73, 75, 77, 78, 79, 80, 84, 86, 89, 91, 92, 94, 101, 105, 106, 108, 112, 113, 114, 115, 117, 120 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Ivan Neretin, Table of n, a(n) for n = 1..10000 FORMULA a(n) = (A142332(n)-83)/90. MAPLE A142332 := proc(n)         option remember;         if n = 1 then                 83 ;         else                 a := nextprime(procname(n-1)) ;                 while (a mod 45) <> 38 do                         a := nextprime(a) ;                 end do;                 return a;         end if; end proc: A196007 := proc(n)         (A142332(n)-83)/90 ; end proc: seq(A196007(n), n=1..80) ; # R. J. Mathar, Oct 31 2011 MATHEMATICA Select[Range[0, 120], PrimeQ[90 # + 83] &] (* Ivan Neretin, May 02 2017 *) PROG (PARI) is(n)=isprime(90*n+83) \\ Charles R Greathouse IV, Jul 12 2016 CROSSREFS Cf. A196000, A198382, A181732, A195993. These are digital root and last digit preserving sequences. Sequence in context: A250051 A076079 A229593 * A134170 A276560 A339577 Adjacent sequences:  A196004 A196005 A196006 * A196008 A196009 A196010 KEYWORD nonn,easy AUTHOR J. W. Helkenberg, Oct 27 2011 STATUS approved

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Last modified August 14 05:20 EDT 2022. Contains 356110 sequences. (Running on oeis4.)