A053053 Append n-th prime to previous term, reverse alternate terms.

2, 32, 235, 7532, 235711, 13117532, 2357111317, 191713117532, 23571113171923, 2923191713117532, 235711131719232931, 37312923191713117532, 2357111317192329313741, 434137312923191713117532, 23571113171923293137414347, 5347434137312923191713117532

Offset

1,1

References

Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000

Links

Harvey P. Dale, Table of n, a(n) for n = 1..299

Mathematica

Module[{nn=20, prs}, prs=Prime[Range[nn]]; Table[FromDigits[ Flatten[ IntegerDigits /@ If[EvenQ[n], Reverse[Take[prs, n]], Take[prs, n]]]], {n, nn}]] (* Harvey P. Dale, Jul 10 2016 *)

Crossrefs

Sequence in context: A128789 A356345 A053316 * A053054 A224903 A008512

Adjacent sequences: A053050 A053051 A053052 * A053054 A053055 A053056

Keyword

easy,base,nonn,less

Author

Felice Russo, Feb 25 2000

Extensions

Corrected and extended by Harvey P. Dale, Jul 10 2016

Status

approved