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 A067749 Numbers k such that k and 3^k end with the same two digits. 0
 87, 187, 287, 387, 487, 587, 687, 787, 887, 987, 1087, 1187, 1287, 1387, 1487, 1587, 1687, 1787, 1887, 1987, 2087, 2187, 2287, 2387, 2487, 2587, 2687, 2787, 2887, 2987, 3087, 3187, 3287, 3387, 3487, 3587, 3687, 3787, 3887, 3987, 4087, 4187, 4287, 4387 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (2,-1). FORMULA a(n) = 100*n - 13. MATHEMATICA 100*Range[50]-13 (* or *) LinearRecurrence[{2, -1}, {87, 187}, 50] (* Harvey P. Dale, Jul 18 2016 *) PROG (PARI) a(n) = 100*n - 13; \\ Jinyuan Wang, Apr 05 2020 CROSSREFS Sequence in context: A324111 A044419 A044800 * A063349 A101259 A063336 Adjacent sequences:  A067746 A067747 A067748 * A067750 A067751 A067752 KEYWORD nonn,base,easy AUTHOR Benoit Cloitre, Mar 07 2002 STATUS approved

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Last modified October 26 19:14 EDT 2020. Contains 338027 sequences. (Running on oeis4.)