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A360591 Primes in A360464. 0

%I #47 Mar 04 2023 15:15:35

%S 2,3,5,7,17,29,43,59,97,193,251,277,389,439,491,577,601,659,719,911,

%T 1049,1237,1429,1511,1951,2141,2239,2293,2339,2441,3329,3449,3571,

%U 3637,3821,3889,4079,4211,4481,4759,5569,5641,6269,6761,7537,7621,8161,8629,8719

%N Primes in A360464.

%C This sequence is finite and a(103) = A360464(457) = 61861 is the last term here, since A360464(k) is divisible by 5 for all k >= 458.

%F A000040 intersect A360464.

%t s[1] = s[2] = s[3] = 1; s[n_] := s[n] = s[n - 1] + s[n - 2] - s[n - 3] + GCD[s[n - 1], s[n - 3]]; Select[Array[s, 180], PrimeQ] (* _Amiram Eldar_, Feb 24 2023 *)

%Y Cf. A000040, A360464.

%K nonn,fini

%O 1,1

%A _Jack Braxton_, Feb 12 2023

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Last modified June 21 19:18 EDT 2024. Contains 373558 sequences. (Running on oeis4.)