OFFSET
1,2
COMMENTS
Number of digits of each term is the sequence A038718. - Dmitry Kamenetsky, Jan 17 2009
LINKS
John Cerkan, Table of n, a(n) for n = 1..17
MAPLE
a:= proc(n) option remember; `if`(n=1, 1, (s-> parse(cat(
seq(parse(s[i])*5, i=1..length(s)))))(""||(a(n-1))))
end:
seq(a(n), n=1..10); # Alois P. Heinz, May 25 2018
MATHEMATICA
NestList[FromDigits[Flatten[IntegerDigits/@(5*IntegerDigits[#])]]&, 1, 10] (* Harvey P. Dale, Dec 31 2013 *)
PROG
(Python)
def A061583_first(n):
an = "1"
a061583 = []
while n > 1:
a061583.append(int(an))
newan = ""
for i in an:
newan += str(5*int(i))
an = newan
n -= 1
a061583.append(int(an))
return a061583 # John Cerkan, May 25 2018
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Amarnath Murthy, May 13 2001
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org) and Asher Auel, May 15 2001
STATUS
approved