A031159 Twin lucky numbers (upper terms).

3, 9, 15, 33, 51, 69, 75, 129, 135, 171, 195, 237, 261, 285, 321, 393, 429, 477, 489, 519, 537, 579, 615, 621, 645, 729, 741, 885, 897, 927, 933, 981, 993, 1011, 1023, 1041, 1095, 1107, 1203, 1233, 1251, 1263, 1389, 1419, 1473, 1497, 1503

Offset: 1

Author

Patrick De Geest

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000959, A031158, A031159, A031160.

Extensions

Offset corrected by Amiram Eldar, Nov 15 2019