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A360840 3-full numbers (A036966) sandwiched between twin primes. 5
432, 2592, 139968, 444528, 472392, 995328, 3456000, 5174928, 6561000, 10125000, 15552000, 15804072, 17496000, 25299648, 28449792, 37340352, 54675000, 63700992, 85957848, 88723728, 99574272, 120891312, 144027072, 169869312, 177147000, 197413632, 253125000, 259308000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Twin Primes.
EXAMPLE
432 = 2^4 * 3^3 is a term since it is 3-full and 431 and 433 are twin primes.
MATHEMATICA
Select[6*Range[10^6], PrimeQ[# - 1] && PrimeQ[# + 1] && Min[FactorInteger[#][[;; , 2]]] > 2 &]
PROG
(PARI) is(n) = isprime(n-1) && isprime(n+1) && vecmin(factor(n)[, 2]) > 2;
CROSSREFS
Intersection of A014574 and A036966.
Subsequence of A113839.
Sequence in context: A250815 A006910 A015229 * A248460 A234327 A174717
KEYWORD
nonn
AUTHOR
Amiram Eldar, Feb 23 2023
STATUS
approved

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Last modified July 14 19:09 EDT 2024. Contains 374323 sequences. (Running on oeis4.)