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A367104
First of 5 consecutive semiprimes congruent to 1,2,3,4,5 (mod 6).
1
25, 133, 187, 4873, 5713, 8005, 11293, 11707, 13645, 19657, 33853, 37033, 48217, 58117, 74701, 81541, 84907, 106177, 107257, 113977, 114559, 117313, 130837, 154273, 158845, 162397, 168997, 174073, 181057, 202927, 208477, 229513, 233845, 236059, 246601, 266173, 274717, 280813, 283333, 304585
OFFSET
1,1
LINKS
David A. Corneth, PARI program
EXAMPLE
a(3) = 187 is a term because 187,194,201,202,203 are consecutive semiprimes congruent to 1, 2, 3, 4, 5 (mod 6) respectively.
MAPLE
sp:= select(t -> numtheory:-bigomega(t)=2, [$4..10^6]):
sp6:= sp mod 6:
sp[select(i -> sp6[i..i+4] = [$1..5], [$1..nops(sp)-5])];
PROG
(PARI) \\ See PARI program
CROSSREFS
Cf. A001358.
Sequence in context: A232856 A232792 A305956 * A364194 A317217 A147489
KEYWORD
nonn
AUTHOR
Zak Seidov and Robert Israel, Nov 04 2023
STATUS
approved