A112767 Beginning with 2, primes of the form: least multiple of the previous term followed by a 1. Beginning with 2, a(n) is the least prime of the form k*a(n-1)*10 + 1.

2, 41, 821, 16421, 328421, 59115781, 13005471821, 260109436421, 36415321098941, 2184919265936461, 196642733934281491, 31462837429485038561, 5348682363012456555371, 4011511772259342416528251, 842417472174461907470932711, 33696698886978476298837308441

Offset

1,1

Links

Michael De Vlieger, Table of n, a(n) for n = 1..300

Mathematica

lmpt[n_]:=Module[{k=2}, While[!PrimeQ[10*k*n+1], k++]; 10*k*n+1]; NestList[ lmpt, 2, 20] (* Harvey P. Dale, Jan 21 2016 *)

Crossrefs

Cf. A112782, A112783, A112784.

Sequence in context: A037061 A065587 A264453 * A350917 A058246 A176941

Adjacent sequences: A112764 A112765 A112766 * A112768 A112769 A112770

Keyword

base,nonn

Author

Amarnath Murthy, Jan 02 2006

Extensions

More terms from Joshua Zucker, Jan 11 2006

More terms from Harvey P. Dale, Jan 21 2016

Status

approved