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A061489 Numbers that are Fibonacci numbers plus or minus 1. 3
0, 1, 2, 3, 4, 6, 7, 9, 12, 14, 20, 22, 33, 35, 54, 56, 88, 90, 143, 145, 232, 234, 376, 378, 609, 611, 986, 988, 1596, 1598, 2583, 2585, 4180, 4182, 6764, 6766, 10945, 10947, 17710, 17712, 28656, 28658, 46367, 46369, 75024, 75026, 121392, 121394, 196417 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Only the first four terms are Fibonacci numbers per se. - Alonso del Arte, Oct 05 2017

LINKS

Harry J. Smith, Table of n, a(n) for n=1,...,500

Ron Knott, Mathematics of the Fibonacci Series

MATHEMATICA

Union[Table[Fibonacci[i] - 1, {i, 30}], Table[Fibonacci[j] + 1, {j, 0, 30}]]

Union[Flatten[# + {1, -1} &/@ Fibonacci[Range[30]]]] (* Harvey P. Dale, Dec 26 2015 *)

PROG

(PARI) { t="b061489.txt"; for (n=1, 4, write(t, n, " ", n - 1) ); g=3; h=2; for (n=3, 250, f=g + h; h=g; g=f; write(t, 2*n - 1, " ", f - 1); write(t, 2*n, " ", f + 1) ) } \\ Harry J. Smith, Jul 23 2009

CROSSREFS

Cf. A000071, A001611 (the union of those two sequences forms this sequence).

Sequence in context: A145803 A018629 A018357 * A117595 A050050 A222801

Adjacent sequences:  A061486 A061487 A061488 * A061490 A061491 A061492

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 08 2001

EXTENSIONS

More terms from Robert G. Wilson v, Nov 12 2001

STATUS

approved

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Last modified September 23 10:42 EDT 2021. Contains 347612 sequences. (Running on oeis4.)