editing
approved
# Function 'UlamList' is defined in A002858.
UlamPrimes := n -> select(k->isprime(k), UlamList(n)):
UlamPrimes(403); # Peter Luschny, Apr 05 2019
_Charles R Greathouse IV_, <, <a href="/A068820/b068820.txt">Table of n, a(n) for n = 1..49221</a>
OEIS Server: https://oeis.org/edit/global/1915
_Charles R Greathouse IV, <_, <a href="/A068820/b068820.txt">Table of n, a(n) for n = 1..49221</a>
OEIS Server: https://oeis.org/edit/global/1914
_Naohiro Nomoto (n_nomoto(AT)yabumi.com), _, Mar 29 2002
OEIS Server: https://oeis.org/edit/global/907
Charles R Greathouse IV, <a href="="/A068820/b068820.txt">Table of n, a(n) for n = 1..49221</a>
easy,nonn,new
Charles R Greathouse IV, <a href="b068820.txt">Table of n, a(n) for n = 1..49221</a>
Ulam numbers that are primes.
2, 3, 11, 13, 47, 53, 97, 131, 197, 241, 409, 431, 607, 673, 739, 751, 983, 991, 1103, 1433, 1489, 1531, 1553, 1709, 1721, 2371, 2393, 2447, 2633, 2789, 2833, 2897, 3041, 3109, 3217, 3371, 3373, 3527, 3547, 3593, 3671, 3691, 4057, 4153, 4211, 4297, 4363
1,1
Cf. A002858.
easy,nonn
Naohiro Nomoto (n_nomoto(AT)yabumi.com), Mar 29 2002