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 A333428 Starts of runs of 3 consecutive primorial base Niven numbers (A333426). 15
 64, 244, 424, 2344, 2524, 4624, 16180, 30064, 30244, 32344, 43900, 60064, 71620, 91408, 99340, 127060, 154780, 182500, 210220, 250936, 338632, 365860, 477280, 510544, 510724, 512824, 513160, 540544, 540880, 790900, 842884, 876988, 1021024, 1021648, 1024000, 1051720 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..1000 EXAMPLE 64 is a term since 64, 65 and 66 are all primorial base Niven numbers. MATHEMATICA max = 7; bases = Prime @ Range[max, 1, -1]; nmax = Times @@ bases - 1; primNivenQ[n_] := Divisible[n, Plus @@ IntegerDigits[n, MixedRadix[bases]]]; q1 = primNivenQ[1]; q2 = primNivenQ[2]; seq = {}; Do[q3 = primNivenQ[n]; If[q1 && q2 && q3, AppendTo[seq, n - 2]]; q1 = q2; q2 = q3, {n, 3, nmax}]; seq CROSSREFS Cf. A154701, A328206, A328210, A328214, A330932, A333426, A333427. Sequence in context: A349109 A223332 A340696 * A197605 A198071 A218902 Adjacent sequences: A333425 A333426 A333427 * A333429 A333430 A333431 KEYWORD nonn AUTHOR Amiram Eldar, Mar 20 2020 STATUS approved

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Last modified April 17 17:01 EDT 2024. Contains 371765 sequences. (Running on oeis4.)