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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
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
Sequence in context: A349109 A223332 A340696 * A197605 A198071 A218902
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.)