A214328 Intersection of A004214 and A018825.

1, 4, 7, 15, 16, 23, 28, 31, 39, 47, 55, 60, 63, 64, 71, 79, 87, 92, 95, 103, 111, 112, 119, 124, 127, 135, 143, 151, 156, 159, 167, 175, 183, 188, 191, 199, 207, 215, 220, 223, 231, 239, 240, 247, 252, 255, 256, 263, 271, 279, 284, 287, 295, 303, 311, 316, 319, 327, 335, 343, 348, 351, 359, 367, 368, 375, 380, 383, 391, 399, 407, 412, 415, 423, 431, 439

Offset: 1

Author

N. J. A. Sloane, Jul 26 2012, following a suggestion from Hans Isdahl, Apr 19 2012

Keywords

• nonn

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000408, A004214, A000404, A018825, A214329.

Formula

a(n) ~ 6 * n. - Bill McEachen, Mar 24 2024