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Primes p such that p - k and p + k have the same number of prime factors (with multiplicity), for k = 1..7.
3

%I #10 May 31 2022 12:52:31

%S 91289867,247780811,350499731,353523083,394923913,418273259,441459853,

%T 452876747,645159257,702723851,718541749,728741617,729758423,

%U 776424947,791860151,1191670069,1289075413,1457951063,1508119211,1527473449,1563808777,1568639509,1611010391,1662823523,1705045429,1801303463,1856184949,1869622537,1973952949,2003664181,2185051189,2204016173,2310441383,2331375133,2439952297,2448065387

%N Primes p such that p - k and p + k have the same number of prime factors (with multiplicity), for k = 1..7.

%F {primes p: A001222(p-k)=A001222(p+k) for all k=1..7}.

%e p=91289867 is in the sequence because A001222(p-1)=A001222(p+1) = 4, A001222(p-2)=A001222(p+2)=3, A001222(p-3)=A001222(p+3)=5 etc, pairwise equal.

%Y Subsequence of A323498.

%Y Cf. A115103.

%K nonn

%O 1,1

%A _Zak Seidov_, Jan 17 2019