A059798 Primes p such that |p - q| is a square, where q is the reversal of p.

23, 37, 43, 59, 67, 73, 89, 1237, 1567, 1787, 1907, 2141, 2251, 2297, 2633, 2963, 3019, 4079, 4253, 4363, 4583, 6637, 6701, 6857, 6967, 7211, 7321, 7541, 8147, 8419, 8923, 8969, 9103, 9323, 9433, 29303, 29803, 40093, 40193, 40493, 40693, 40993

Offset

1,1

Links

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

Formula

Subtract reversal of prime from prime. Take absolute value. If a square, add to sequence.

Example

a(7)=1237. Reverse is 7321 so 7321-1237=6084 and 6084 is a square whose root is 78.

Crossrefs

Cf. A059799.

Sequence in context: A154114 A163384 A291689 * A290767 A173829 A110673

Adjacent sequences: A059795 A059796 A059797 * A059799 A059800 A059801

Keyword

easy,nonn,base

Author

Enoch Haga, Feb 23 2001

Status

approved