A112601 a(n) = prime(b(n)) where b(n) = b(n-2) + a(n-1) (with b(1)=1, b(2)=2).

2, 3, 7, 23, 103, 613, 4751, 47137, 582511, 8758339, 156819893, 3283370969, 79174605361, 2171048919947, 66970610115763, 2302616062156639, 87542957597514007, 3654858165039471959

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Mathematica

a[n_] := a[n] = Prime[b[n]]; b[1] = 1; b[2] = 2; b[n_] := b[n] = b[n - 2] + a[n - 1]; Array[a, 15] (* Robert G. Wilson v, Dec 22 2005 *)

Crossrefs

Cf. A111392, A112237.

Sequence in context: A237359 A087164 A077213 * A181609 A205827 A098544

Adjacent sequences: A112598 A112599 A112600 * A112602 A112603 A112604

Keyword

nonn,more

Author

Yasutoshi Kohmoto, Dec 15 2005

Extensions

Better definition from Dean Hickerson, more terms from Emeric Deutsch, Dec 17 2005

a(12)-a(15) from Robert G. Wilson v, Dec 22 2005

a(16)-a(18) from Amiram Eldar, Sep 12 2022

Status

approved