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A046402
Numbers with exactly 4 distinct palindromic prime factors.
4
210, 330, 462, 770, 1155, 3030, 3930, 4242, 4530, 5430, 5502, 5730, 6342, 6666, 7070, 7602, 8022, 8646, 9170, 9390, 9966, 10570, 10590, 10605, 11110, 11190, 11490, 11946, 12606, 12670, 13146, 13370, 13755, 14410, 14826, 15554, 15666, 15855, 16086, 16610, 16665
OFFSET
1,1
LINKS
MATHEMATICA
Take[Times@@@Module[{nn=300, pp}, pp=Select[Prime[Range[nn]], PalindromeQ]; Subsets[pp, {4}]]//Union, 40] (* Harvey P. Dale, Aug 13 2024 *)
CROSSREFS
Intersection of A033620 and A046386.
Cf. A046370.
Sequence in context: A350373 A046386 A229272 * A258359 A325991 A264664
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1998
EXTENSIONS
Offset changed and a(37) onwards from Andrew Howroyd, Aug 14 2024
STATUS
approved