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 A067867 Numbers n such that n and 2^n end with the same 4 digits. 0
 8736, 18736, 28736, 38736, 48736, 58736, 68736, 78736, 88736, 98736, 108736, 118736, 128736, 138736, 148736, 158736, 168736, 178736, 188736, 198736, 208736, 218736, 228736, 238736, 248736, 258736, 268736, 278736, 288736, 298736, 308736 (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) = 8736 + 10^4(n-1). a(n) = 2*a(n-1)-a(n-2). G.f.: 16*x*(546+79*x)/(1-x)^2. [Colin Barker, Dec 01 2012] PROG (PARI) isok(n) = (2^n - n) % 10000 == 0; \\ Michel Marcus, Nov 23 2013 CROSSREFS Cf. A064541. Subsequence of A067844, A067845 and A067846. Sequence in context: A165630 A250999 A214171 * A234734 A250881 A234707 Adjacent sequences:  A067864 A067865 A067866 * A067868 A067869 A067870 KEYWORD easy,nonn,base AUTHOR Benoit Cloitre, Mar 07 2002 STATUS approved

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Last modified November 19 19:08 EST 2018. Contains 317364 sequences. (Running on oeis4.)