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Primes in A001003.
5

%I #17 Feb 09 2023 04:43:40

%S 3,11,197,103049

%N Primes in A001003.

%C The next term is too large to include.

%H Harry J. Smith, <a href="/A092840/b092840.txt">Table of n, a(n) for n = 1..5</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SuperCatalanNumber.html">Super Catalan Number</a>

%o (PARI) s(m)= { if (m==1, return(a1)); if (m==2, return(a2)); r = (3*(2*m - 3)*a2 - (m - 3)*a1)/m; a1=a2; a2=r; return(r); }

%o { a1=1; a2=1; n=0; for (m=1, 300, a=s(m); if (isprime(a), n++; print1(a, ", "))); } \\ _Harry J. Smith_, Jun 21 2009

%Y Cf. A001003, A092839.

%K nonn

%O 1,1

%A _Eric W. Weisstein_, Mar 07 2004