A028979 Palindromes which are the product of two consecutive primes.

6, 77, 323, 36863, 1115111, 3740615160473

Offset

1,1

Comments

No further terms < 2*10^17.

Next term > 36*10^18. - Robert G. Wilson v, Jun 11 2010

Links

Table of n, a(n) for n=1..6.

P. De Geest, More palindromic products of integer sequences

Example

323 = 17*19 is a member.

Mathematica

palQ[n_] := n == FromDigits@ Reverse@ IntegerDigits@n; p = 2; q = 3; lst = {}; While[p < 6 10^9, If[ palQ[p*q], AppendTo[lst, p*q]; Print[p*q]]; p = q; q = NextPrime@q]; lst (* Robert G. Wilson v, Jun 11 2010 *)

Crossrefs

Cf. A028888, A028978.

Sequence in context: A340886 A305999 A274464 * A082629 A278365 A154642

Adjacent sequences: A028976 A028977 A028978 * A028980 A028981 A028982

Keyword

nonn,base

Author

Patrick De Geest

Status

approved