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A151768 Complement of A071786. 2
19, 23, 29, 41, 43, 46, 47, 53, 57, 58, 59, 61, 67, 69, 82, 83, 86, 87, 89, 94, 103, 109, 115, 116, 122, 123, 127, 129, 137, 138, 139, 141, 159, 161, 163, 171, 173, 174, 177, 178, 183, 193, 197, 201, 203, 205, 206, 207, 209, 211, 215, 218, 223, 227, 229, 230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A number n > 1 is in the sequence if and only if n/A004086(p) is in the sequence for all primes p with A004086(p) dividing n. [Hagen von Eitzen, Jun 23 2009]

A076056 is a subsequence. [Reinhard Zumkeller, Jul 06 2009]

LINKS

Table of n, a(n) for n=1..56.

MAPLE

read("transforms") ; tdpr := proc(nd) local p, n ; p := [] ; for n from 1 do if ithprime(n) > 10^nd then break; else p := [op(p), digrev(ithprime(n))] ; fi; od: sort(p) ; end: A071786 := proc(L, nd) local tmp, tmp2, j, k, i ; tmp := [] ; for j from 0 do if op(1, L)^j > 10^nd then break; fi; tmp := [op(tmp), op(1, L)^j] ; od: for i from 2 to nops(L) do tmp2 := {} ; for k from 1 to nops(tmp) do for j from 0 do if op(k, tmp)*op(i, L)^j > 10^nd then break; fi; tmp2 := tmp2 union { op(k, tmp)*op(i, L)^j} ; od: od: tmp := convert(tmp2, list) ; od: tmp ; end: maxp10 := 3 : L := tdpr(maxp10) : a151768c := A071786(L, maxp10) : for n from 1 to 10^maxp10 do if not n in a151768c then printf("%d, ", n) ; fi; od: # R. J. Mathar, Jun 24 2009

PROG

(PARI) A=Set([]); for(n=2, 300, ok=0; fordiv(n, d, if(!setsearch(A, d)&&isprime(rev(n/d)), ok=1; break)); if(!ok, print1(n, ", "); A=setunion(A, Set([n])))) \\ Hagen von Eitzen, Jun 23 2009

CROSSREFS

Sequence in context: A073319 A274048 A120640 * A270083 A286333 A076056

Adjacent sequences:  A151765 A151766 A151767 * A151769 A151770 A151771

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Jun 22 2009

EXTENSIONS

More terms from Hagen von Eitzen and R. J. Mathar, Jun 23 2009

STATUS

approved

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Last modified May 24 04:25 EDT 2019. Contains 323528 sequences. (Running on oeis4.)