A098549 A098548(A098548(n)).

1, 2, 3, 4, 27, 28, 69, 70, 93, 94, 117, 118, 141, 142, 183, 184, 207, 208, 237, 238, 261, 262, 303, 304, 327, 328, 351, 352, 369, 370, 417, 418, 441, 442, 459, 460, 483, 484, 531, 532, 549, 550, 579, 580, 603, 604, 651, 652, 669, 670, 693, 694, 717, 718, 759

Offset: 1

Author

Reinhard Zumkeller, Sep 14 2004

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A098548.

Programs

Haskell

a098549 = a098548 . a098548  -- Reinhard Zumkeller, Nov 21 2014