A083433 a(1) = 1; a palindrome is included in the sequence if it has a prime signature that is different from all previous terms.

1, 2, 4, 6, 8, 44, 66, 88, 252, 272, 414, 484, 616, 858, 2112, 2772, 2992, 4004, 4224, 6006, 6336, 6776, 8008, 8448, 14641, 25952, 27872, 27972, 29592, 29792, 36963, 40404, 42224, 42624, 44544, 44944, 48384, 63336, 63536, 63936, 69696, 84448

Offset

1,2

Links

Table of n, a(n) for n=1..42.

Example

66 = 2*3*11 is the smallest palindrome with prime signature p*q*r;
252 = 2^2*3^2*7 is the smallest palindrome with prime signature p^2*q^2*r;
77 is not a member as 6 which is a member has the same prime signature p*q;
where p,q,r are primes.

Crossrefs

Cf. A083434, A083435.

Sequence in context: A108425 A215216 A059569 * A083435 A163502 A110995

Adjacent sequences: A083430 A083431 A083432 * A083434 A083435 A083436

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 29 2003

Extensions

Corrected and extended by David Wasserman, Nov 03 2004

Status

approved