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 A133361 Multiply by 9 and reverse. 8
 1, 9, 18, 261, 9432, 88848, 236997, 3792312, 80803143, 782822727, 3454045407, 36680468013, 711212421033, 7929871190046, 41401704886317, 358679343516273, 7546461904118223, 70046073175181976, 487736675856414036, 4236277072800369834, 60582330255639462183 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..1000 FORMULA a(n) = reverse(9*a(n-1)) where a(1) = 1. Conjecture: a(n)^(1/n) tends to 10. - Vaclav Kotesovec, Jan 03 2020 MAPLE a:= proc(n) option remember; `if`(n=1, 1, (s-> parse(cat(s[-i]\$i=1..length(s))))(""||(9*a(n-1)))) end: seq(a(n), n=1..25); # Alois P. Heinz, Apr 09 2015 MATHEMATICA a[n_] := a[n] = If[n==1, 1, IntegerReverse[9a[n-1]]]; a /@ Range[40] (* Jean-François Alcover, Jan 01 2021 *) CROSSREFS Cf. A036447 (*2), A163632 (*3), A132064 (*4), A045539 (*5), A132078 (*6), A132114 (*7), A132113 (*8). Sequence in context: A002169 A050685 A278588 * A353183 A005400 A134115 Adjacent sequences: A133358 A133359 A133360 * A133362 A133363 A133364 KEYWORD base,nonn AUTHOR Rachit Agrawal (rachit_agrawal(AT)daiict.ac.in), Oct 26 2007 EXTENSIONS More terms from Alois P. Heinz, Apr 09 2015 STATUS approved

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Last modified December 11 07:17 EST 2023. Contains 367717 sequences. (Running on oeis4.)