A247028 Primes in tetranacci sequence A001631.

2, 7, 193, 19079, 1823013184807, 324494495853101147203936847, 16085434555484907108254435283952049, 255525859571903290673264616283734506003204622439226993660213169027169

Offset

1,1

Comments

a(9) is too large to display here. It has 160 digits and is the 564th term in A001631.

Links

Table of n, a(n) for n=1..8.

Mathematica

a={0, 0, 1, 0}; For[n=4, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[4]]=sum]

Crossrefs

Cf. A001590, A001631, A100683, A231574, A231575, A232543, A214899, A020992, A233554. A214727, A234696, A141523, A235862,A214825, A235873, A001630, A241660, A247027.

Sequence in context: A015174 A307582 A125610 * A333740 A306951 A181864

Adjacent sequences: A247025 A247026 A247027 * A247029 A247030 A247031

Keyword

nonn

Author

Robert Price, Sep 09 2014

Status

approved