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 A013898 a(n) = 21^(5*n + 1). 1
 21, 85766121, 350277500542221, 1430568690241985328321, 5842587018385982521381124421, 23861715484377209601555171628930521, 97453656071460446110921078004886769746621, 398010574215107679422058885600836061208944572721, 1625515384162495488635310116741260158419511738394408821 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(n) mod 10 == 1 (the least significant decimal digit of each term is 1). LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..50 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (4084101). FORMULA a(n) = 4084101*a(n-1), a(0)=21. - Vincenzo Librandi, May 27 2011 MATHEMATICA NestList[4084101#&, 21, 10] (* Harvey P. Dale, Apr 17 2013 *) PROG (MAGMA) [21^(5*n+1): n in [0..10]]; // Vincenzo Librandi, May 27 2011 CROSSREFS Cf. A009965. Sequence in context: A033636 A138080 A013814 * A180727 A250487 A062012 Adjacent sequences:  A013895 A013896 A013897 * A013899 A013900 A013901 KEYWORD nonn AUTHOR STATUS approved

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Last modified January 24 03:55 EST 2019. Contains 319412 sequences. (Running on oeis4.)