VOOZH about

URL: https://oeis.org/A287353

⇱ A287353 - OEIS

login
A287353
a(0)=0; for n>0, a(n) = 10*a(n-1) + prime(n).
4
0, 2, 23, 235, 2357, 23581, 235823, 2358247, 23582489, 235824913, 2358249159, 23582491621, 235824916247, 2358249162511, 23582491625153, 235824916251577, 2358249162515823, 23582491625158289
OFFSET
0,2
LINKS
FORMULA
a(n) = Sum_{i=1..n} 10^(n-i)*prime(i), n >= 1. - Ya-Ping Lu, Dec 24 2024
MATHEMATICA
FoldList[10 #1 + Prime@ #2 &, 0, Range@ 17] (* Michael De Vlieger, May 24 2017 *)
PROG
(Python)
from sympy import prime
l = [0]
for i in range(20):
l += [10 * l[i] + prime(i + 1)]
print(l) # Indranil Ghosh, May 25 2017
(PARI) a(n) = fromdigits(primes(n)); \\ Kevin Ryde, Jun 22 2022
CROSSREFS
Cf. A379426 (prime terms).
Sequence in context: A118385 A386964 A098739 * A091762 A309706 A240959
KEYWORD
nonn,easy
AUTHOR
Luke Zieroth, May 23 2017
STATUS
approved