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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 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: A082663 A368231 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 June 16 10:42 EDT 2024. Contains 373425 sequences. (Running on oeis4.)