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A256958 The integers (shown from -50 on). 18
-50, -49, -48, -47, -46, -45, -44, -43, -42, -41, -40, -39, -38, -37, -36, -35, -34, -33, -32, -31, -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, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50 (list; graph; refs; listen; history; text; internal format)
OFFSET
-50,1
COMMENTS
The first 101 terms are the central 101 terms of the integers.
The reason for including this entry is to provide search results for sequences of the form -k, -k+1, -k+2, ... for small positive k.
LINKS
FORMULA
a(n) = 2 a(n-1) - a(n-2). G.f.: x^(-50)*(-50 + 51*x)/(1 - x)^2. - M. F. Hasler, Apr 18 2015
MATHEMATICA
Range[101] - 51 (* Alonso del Arte, Apr 14 2015 *)
PROG
(Magma) [n: n in [-50..50]]; // Vincenzo Librandi, Apr 14 2015
(Python) list(range(-50, 51)) # Danny Rorabaugh, Apr 18 2015
(PARI) vector(101, n, n-51) \\ In the spirit of other "programs", but actually the result does not have offset -50. - M. F. Hasler, Apr 19 2015
(PARI) A256958(n)=n \\ M. F. Hasler, Apr 19 2015
CROSSREFS
See A001477 for the nonnegative integers and A000027 for the positive terms.
See A001057, A130472 for other enumerations of the integers.
See also A023443, ..., A023477, A023479, ..., A023482, A022958, ..., A022996; A053615.
The first 101 terms are the 50th row of triangle A196199. - Omar E. Pol, Apr 14 2015
Sequence in context: A248688 A291495 A207141 * A165871 A171652 A078289
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Revised by N. J. A. Sloane, Apr 19 2015 at the suggestion of M. F. Hasler
STATUS
approved

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Last modified June 20 12:38 EDT 2024. Contains 373527 sequences. (Running on oeis4.)