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A334309 Numbers k such that k and k+1 are both base phi Niven numbers (A334308). 5
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

Amiram Eldar, Table of n, a(n) for n = 1..10000

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

Cf. A328205, A328209, A328213, A330927, A330931, A333427, A334308.

Sequence in context: A242235 A082663 A109068 * A238232 A061367 A070161

Adjacent sequences:  A334306 A334307 A334308 * A334310 A334311 A334312

KEYWORD

nonn,base

AUTHOR

Amiram Eldar, Apr 22 2020

STATUS

approved

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Last modified July 30 15:29 EDT 2021. Contains 346359 sequences. (Running on oeis4.)