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A334309 Numbers k such that k and k+1 are both base phi Niven numbers (A334308). 16
1, 15, 35, 90, 95, 231, 644, 728, 944, 1016, 1110, 1331, 1629, 1736, 1770, 1899, 1925, 2232, 2255, 2384, 2456, 2629, 2652, 2760, 3104, 3176, 3288, 3444, 3729, 3789, 3860, 4410, 4415, 4509, 4544, 4718, 4939, 4960, 5229, 5239, 5489, 5789, 5831, 5984, 6039, 6111 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
1 is a term since 1 and 2 are both base phi Niven numbers.
MATHEMATICA
phiDigSum[1] = 1; phiDigSum[n_] := Plus @@ RealDigits[n, GoldenRatio, 2*Ceiling[ Log[GoldenRatio, n] ]][[1]]; phiNivenQ[n_] := Divisible[n, phiDigSum[n]]; Select[Range[6000], phiNivenQ[#] && phiNivenQ[# + 1] &]
CROSSREFS
Sequence in context: A082663 A368231 A109068 * A238232 A061367 A070161
KEYWORD
nonn,base
AUTHOR
Amiram Eldar, Apr 22 2020
STATUS
approved

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Last modified June 16 10:42 EDT 2024. Contains 373425 sequences. (Running on oeis4.)