OFFSET
1,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..1000
FORMULA
To obtain the (n+1)-th term, write the n-th term as k * 5^n. Multiply k by a multiple of 2^n to get a multiple of 5. Add the multiplicator of 2^n to the left of the n-th term.
EXAMPLE
a(5) = 53125 = 17 * 5^5.
PROG
(PARI) lista(nn) = {v = vector(nn); v[1] = 5; for(k = 2, nn, j = 1; while((j*10^(k-1) + v[k-1]) % 5^k > 0, j++); v[k] = j*10^(k-1) + v[k-1]); for(k = 1, nn, print1(v[k], ", ")); } \\ Jinyuan Wang, Aug 27 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Michel Criton (mcriton(AT)wanadoo.fr), May 24 2008
EXTENSIONS
More terms from Alois P. Heinz, Apr 05 2017
STATUS
approved