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A105985 Near-repdigit semiprimes with 4 as repeated digit. 0

%I #2 Oct 02 2013 15:47:27

%S 445,446,447,454,4414,4442,4443,4449,4474,44441,44494,444441,444494,

%T 4444441,4444449,44444441,44444446,44444447,444444449,444444454,

%U 4444444441,4444444443,44444444443,44444444446,44444444449,444444444447

%N Near-repdigit semiprimes with 4 as repeated digit.

%e a(2)=446 is a term because 446 is a semiprime and all digits are equal to 4 except one.

%K base,nonn

%O 1,1

%A _Shyam Sunder Gupta_, Apr 29 2005

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Last modified September 11 17:54 EDT 2024. Contains 375839 sequences. (Running on oeis4.)