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-30, -29, -28, -27, -26, -25, -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 0..5000
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (2, -1).
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FORMULA
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From G. C. Greubel, Dec 07 2018: (Start)
G.f.: (31*x - 30)/(1-x)^2
E.g.f.: (x - 30)*exp(x).
a(n) = 2*a(n-1) - a(n-2). (End)
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MATHEMATICA
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Range[-30, 59] (* Alonso del Arte, Dec 06 2018 *)
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PROG
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(PARI) vector(30, n, n--; n-30) \\ G. C. Greubel, Dec 07 2018
(Magma) [n-30: n in [0..30]]; // G. C. Greubel, Dec 07 2018
(Sage) [n-30 for n in range(30)] # G. C. Greubel, Dec 07 2018
(GAP) List([0..30], n -> n-30); # G. C. Greubel, Dec 07 2018
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CROSSREFS
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Sequence in context: A100935 A112026 A022986 * A327846 A056998 A057348
Adjacent sequences: A023469 A023470 A023471 * A023473 A023474 A023475
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KEYWORD
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sign,easy
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AUTHOR
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N. J. A. Sloane
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STATUS
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approved
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