A158331 List of twin primes p1 and p2 with the sums of digits in p1 and p2 are twin primes.

3, 5, 5, 7, 41, 43, 137, 139, 191, 193, 197, 199, 227, 229, 281, 283, 311, 313, 461, 463, 641, 643, 821, 823, 827, 829, 881, 883, 1031, 1033, 1091, 1093, 1277, 1279, 1301, 1303, 1451, 1453, 1721, 1723, 1871, 1873, 2027, 2029, 2081, 2083, 2087, 2089, 2111

Offset

1,1

Comments

If twin primes of A158311 are p1 and p2, then twin primes are sum of digits of p1 and sum of digits of p2.

Links

Table of n, a(n) for n=1..49.

Example

(3, 5), (5, 7), (137(1+3+7=11), 139(1+3+9=13)), (191(1+9+1=11), 193(1+9+3=13)), (197(1+9+7=17), 199(1+9+9=19)), (227(2+2+7=11), 229(2+2+9=13)), (281(2+8+1=11), 283(2+8+3=13)), (311(3+1+1=5), 313(3+1+3=7)), (461(4+6+1=11), 463(4+6+3=13))

Crossrefs

Cf. A077800.

Sequence in context: A309572 A366679 A296107 * A197286 A019632 A021285

Adjacent sequences: A158328 A158329 A158330 * A158332 A158333 A158334

Keyword

nonn,base,less

Author

Juri-Stepan Gerasimov, Mar 16 2009

Extensions

Corrected( 41,43, 197,199, 641,643 inserted etc.) by R. J. Mathar, May 19 2010

Status

approved