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 A255680 a(n) = n*(n mod 3)*(n mod 5). 1
 0, 1, 8, 0, 16, 0, 0, 14, 48, 0, 0, 22, 0, 39, 112, 0, 16, 68, 0, 76, 0, 0, 44, 138, 0, 0, 52, 0, 84, 232, 0, 31, 128, 0, 136, 0, 0, 74, 228, 0, 0, 82, 0, 129, 352, 0, 46, 188, 0, 196, 0, 0, 104, 318, 0, 0, 112, 0, 174, 472, 0, 61, 248, 0, 256, 0, 0, 134, 408, 0, 0, 142, 0, 219, 592, 0, 76, 308, 0, 316, 0, 0, 164, 498, 0, 0, 172, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) = 0 for n = 3k and 5k, k=0,1,2,... LINKS Colin Barker, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, -1). FORMULA Empirical g.f.: x*(8*x^28 + 6*x^27 + 8*x^25 + 42*x^22 + 16*x^21 + 44*x^18 + 52*x^16 + 14*x^15 + 112*x^13 + 39*x^12 + 22*x^10 + 48*x^7 + 14*x^6 + 16*x^3 + 8*x + 1) / ((x - 1)^2*(x^2 + x + 1)^2*(x^4 + x^3 + x^2 + x + 1)^2*(x^8 - x^7 + x^5 - x^4 + x^3 - x + 1)^2). - Colin Barker, Mar 02 2015 a(n) = n*A010872(n)*A010874(n). - Michel Marcus, Mar 03 2015 MATHEMATICA Table[x*Mod[x, 3]*Mod[x, 5], {x, 0, 100}] LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, {0, 1, 8, 0, 16, 0, 0, 14, 48, 0, 0, 22, 0, 39, 112, 0, 16, 68, 0, 76, 0, 0, 44, 138, 0, 0, 52, 0, 84, 232}, 100] (* Harvey P. Dale, Sep 06 2015 *) PROG (PARI) vector(101, n, (n-1)*((n-1)%3)*((n-1)%5)) (Magma) [n*(n mod 3)*(n mod 5): n in [0..80]]; // Vincenzo Librandi, Mar 03 2015 CROSSREFS Cf. A255642. Sequence in context: A297811 A359686 A325318 * A265115 A214205 A278147 Adjacent sequences: A255677 A255678 A255679 * A255681 A255682 A255683 KEYWORD nonn,easy AUTHOR Zak Seidov, Mar 01 2015 EXTENSIONS Typo in first Mathematica program corrected by Harvey P. Dale, Jul 03 2021 STATUS approved

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Last modified September 26 14:24 EDT 2023. Contains 365660 sequences. (Running on oeis4.)