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 A199683 3*10^n+1. 3
 4, 31, 301, 3001, 30001, 300001, 3000001, 30000001, 300000001, 3000000001, 30000000001, 300000000001, 3000000000001, 30000000000001, 300000000000001, 3000000000000001, 30000000000000001, 300000000000000001, 3000000000000000001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 S. W. Golomb, Properties of the sequence 3.2^n+1, Math. Comp., 30 (1976), 657-663. S. W. Golomb, Properties of the sequence 3.2^n+1, Math. Comp., 30 (1976), 657-663. [Annotated scanned copy] Index entries for linear recurrences with constant coefficients, signature (11,-10). FORMULA a(n) = 10*a(n-1)-9. a(n) = 11*a(n-1)-10*a(n-2). G.f.: (4-13*x)/((1-x)*(1-10*x)). MATHEMATICA 3*10^Range[0, 20]+1 (* or *) LinearRecurrence[{11, -10}, {4, 31}, 20] (* Harvey P. Dale, Dec 12 2016 *) PROG (MAGMA) [3*10^n+1: n in [0..30]]; CROSSREFS Primes: A056807, A259866. Sequence in context: A003436 A307504 A276316 * A114475 A243312 A076280 Adjacent sequences:  A199680 A199681 A199682 * A199684 A199685 A199686 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 09 2011 STATUS approved

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Last modified October 23 22:34 EDT 2019. Contains 328375 sequences. (Running on oeis4.)