A218791 a(n) = binary code (shown here in decimal) of the position of the predecessor of the natural number pair (2n,2n+1) in the compact beanstalk-tree A218780.

1, 2, 6, 10, 26, 58, 42, 74, 202, 458, 330, 842, 586, 1354, 1610, 2634, 6730, 14922, 10826, 27210, 19018, 43594, 51786, 117322, 84554, 182858, 215626, 313930, 477770, 838218, 576074, 1100362, 3197514, 7391818, 5294666, 13683274, 9488970, 22071882, 26266186

Offset: 1

Author

Antti Karttunen, Nov 16 2012

Keywords

• nonn
• base

Links

• A. Karttunen, Table of n, a(n) for n = 1..1024

Crossrefs

Subset of A218615, i.e., a(n) = A218615(A005187(n)).

Also, a(n) = A054429(A218790(n)). (Note also how the first five or so terms are twice the terms in the beginning of A218790, shifted by one term.)

Used to construct A218780, A218781. Cf. also A218787, A218788.

Formula

a(n) = A218615(A005187(n)).