A355309 Carmichael numbers ending in 3.

52633, 63973, 334153, 670033, 997633, 2508013, 2628073, 5968873, 6733693, 13696033, 15829633, 15888313, 18900973, 26280073, 27336673, 46483633, 53711113, 65241793, 67653433, 75765313, 124630273, 133344793, 158864833, 182356993, 227752993, 242641153, 292244833, 426821473, 577240273, 580565233, 600892993

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Index entries for sequences related to Carmichael numbers

Mathematica

Select[10*Range[0, 10^7] + 3, CompositeQ[#] && Divisible[# - 1, CarmichaelLambda[#]] &] (* Amiram Eldar, Jul 25 2022 *)

Prog

(Python)
from itertools import count, islice
from sympy import factorint
def A355309_gen(): # generator of terms
    for n in count(3, 10):
        f = factorint(n)
        if len(f) == sum(f.values()) > 1 and not any((n-1) % (p-1) for p in f):
            yield n
A355309_list = list(islice(A355309_gen(), 5)) # Chai Wah Wu, Jul 26 2022

Crossrefs

Intersection of A002997 and A017305.

Cf. A352970, A354609, A355305, A355307.

Sequence in context: A201268 A200658 A303266 * A185530 A057851 A058326

Adjacent sequences: A355306 A355307 A355308 * A355310 A355311 A355312

Keyword

nonn,base

Author

Omar E. Pol, Jul 25 2022

Status

approved