A372100 a(n) = 2*A000120(3^k) - A070939(3^k) with k = A372099(n).

1, 2, 3, 4, 8, 17, 23, 29, 38, 39, 44, 56, 57, 58, 91, 114, 145, 147, 156, 168, 182, 208, 219, 239, 277, 297, 300, 307, 331, 360, 367, 442, 452, 477, 487, 492, 507, 513, 568, 571, 614, 893, 963, 1275, 1283, 1288, 1440, 1563, 1702, 1957, 2019, 2440, 2471, 2566, 3004

Offset

1,2

Comments

a(n)/2 are the differences at supporting points ​​of the upper envelope of the scatter band of the deviation of the binary weight of 3^k from half the length of the corresponding binary number.

Links

Hugo Pfoertner, Table of n, a(n) for n = 1..96

Crossrefs

Cf. A000120, A000244, A011754, A070939, A078839, A372097, A372098, A372099.

Sequence in context: A140974 A349763 A360000 * A296109 A102276 A215897

Adjacent sequences: A372097 A372098 A372099 * A372101 A372102 A372103

Keyword

nonn

Author

Hugo Pfoertner, Apr 25 2024

Status

approved