A158055 a(1)=2, a(n+1) is the smallest prime > n*first digit of a(n).

2, 3, 7, 23, 11, 7, 43, 29, 17, 11, 11, 13, 13, 17, 17, 17, 17, 19, 19, 23, 41, 89, 179, 29, 53, 127, 29, 59, 149, 31, 97, 281, 67, 199, 37, 107, 37, 113, 41, 157, 41, 167, 43, 173, 47, 181, 47, 191, 53, 251, 101, 53, 263, 107, 59

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

A[1]:= 2:
for n from 1 to 99 do  A[n+1]:= nextprime(n*floor(A[n]/10^(ilog10(A[n])))) od:
seq(A[i], i=1..100); # Robert Israel, Mar 23 2020

Crossrefs

Cf. A000027, A000040, A156615.

Sequence in context: A072214 A233535 A007660 * A156615 A158054 A134412

Adjacent sequences: A158052 A158053 A158054 * A158056 A158057 A158058

Keyword

nonn,base,look

Author

Juri-Stepan Gerasimov, Mar 12 2009

Extensions

Corrected by D. S. McNeil, Mar 21 2009

Status

approved