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A225210 Least number of the form 11*m-1 with exactly n prime factors, counted with multiplicity. 0
43, 10, 76, 54, 32, 560, 648, 384, 1792, 7776, 4608, 10240, 77824, 55296, 32768, 573440, 663552, 393216, 1835008, 7962624, 4718592, 10485760, 79691776, 56623104, 33554432, 587202560, 679477248, 402653184, 1879048192, 8153726976, 4831838208, 10737418240, 81604378624, 57982058496, 34359738368 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Corresponding values of m: 4, 1, 7, 5, 3, 51, 59, 35, 163, 707, 419, 931, 7075, 5027, 2979, 52131, 60323, 35747, 166819, 723875, 428963.
LINKS
FORMULA
a(n) = a(n-10)*2^10 for n > 11.
MATHEMATICA
Module[{nn=725000, f11}, f11={#, PrimeOmega[#]}&/@(11 Range[nn]-1); Table[SelectFirst[f11, #[[2]]==n&], {n, 21}]][[All, 1]] (* The program generates the first 21 terms of the sequence. To generate more, increase the value of the nn constant, but to generate all 35 terms listed nn will have to be increased to nearly 7-1/2 billion and the program will take a very long time to run. *) (* Harvey P. Dale, Dec 04 2021 *)
PROG
(PARI) {for(n = 1, 30, forstep(m = 10, 3276800, 11, if(bigomega(m) == n, print1(m", "); break())))}
CROSSREFS
Inspired by A230123.
Sequence in context: A354085 A156677 A097398 * A033363 A187088 A127147
KEYWORD
nonn
AUTHOR
Zak Seidov, Oct 25 2013
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)