login
A354467
Positive integers whose prime factors are congruent to 1 (mod 12).
0
1, 13, 37, 61, 73, 97, 109, 157, 169, 181, 193, 229, 241, 277, 313, 337, 349, 373, 397, 409, 421, 433, 457, 481, 541, 577, 601, 613, 661, 673, 709, 733, 757, 769, 793, 829, 853, 877, 937, 949, 997, 1009, 1021, 1033, 1069, 1093, 1117, 1129, 1153, 1201, 1213
OFFSET
1,2
COMMENTS
All the prime factors of each term in this sequence are terms of A068228.
MATHEMATICA
Select[Range[10000], Count[Mod[First /@ FactorInteger[#], 12], 1] == Length[FactorInteger[#]] &]
PROG
(PARI) isok(m) = my(f=factor(m)); for (k=1, #f~, if ((f[k, 1] % 12) != 1, return(0))); return (1); \\ Michel Marcus, Jun 02 2022
CROSSREFS
Cf. A068228.
Sequence in context: A089030 A351537 A351536 * A141122 A068228 A031339
KEYWORD
nonn
AUTHOR
Steven Lu, Jun 01 2022
STATUS
approved