

A014852


Numbers n such that n divides s(n), where s(1)=1, s(k)=5*s(k1)+k.


0



1, 5, 55, 355, 605, 3905, 6655, 25205, 42955, 73205, 201995, 277255, 472505
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OFFSET

1,2


COMMENTS

The sequence so far (for n > 1) is the smallest terms of the values of (5 * 11^i * 71^j) for i,j >= 0. Is there another term (prime?) in the product or can it be proved that all entries have this form?


LINKS

Table of n, a(n) for n=1..13.


PROG

(PARI) lista(nn) = {nb = 1000; for (n=1, nn, v = vector(nb, i, (5^(i+(n1)*nb+1)4*(i+(n1)*nb)5)/(16*(i+(n1)*nb))); w = select(n>(type(n) == "t_INT"), v, 1); for (k=1, #w, print1(w[k]+(n1)*nb, ", ")); kill(v); ); } \\ Michel Marcus, May 31 2014


CROSSREFS

s(n) = A014827(n).
Sequence in context: A014700 A103326 A060558 * A144893 A015266 A138163
Adjacent sequences: A014849 A014850 A014851 * A014853 A014854 A014855


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Olivier Gérard


EXTENSIONS

Comment and more terms from Larry Reeves (larryr(AT)acm.org), Mar 24 2000
a(10)a(13) from Michel Marcus, May 31 2014


STATUS

approved



