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A259627
List of numbers L - 1, L, and L+1, where L = A000032, the Lucas numbers, sorted into increasing order and duplicates removed.
3
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 17, 18, 19, 28, 29, 30, 46, 47, 48, 75, 76, 77, 122, 123, 124, 198, 199, 200, 321, 322, 323, 520, 521, 522, 842, 843, 844, 1363, 1364, 1365, 2206, 2207, 2208, 3570, 3571, 3572, 5777, 5778, 5779, 9348, 9349, 9350, 15126
OFFSET
1,3
LINKS
FORMULA
G.f.: -((x (1 + x) (1 + x^2) (1 + 2 x + 3 x^2 + 2 x^3 + 2 x^4 + 2 x^5 +
2 x^6))/((1 + x + x^2) (-1 + x^3 + x^6)))
MATHEMATICA
Union[# - 1, #, # + 1] &[LucasL[Range[50]]]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved