A277806 a(n) = A000196(A277699(A277807(n))).

115, 230, 460, 461, 920, 922, 1840, 1844, 3680, 3688, 7360, 7376, 14720, 14752, 29440, 29504, 56757, 58880, 59008, 113514, 117760, 118016, 130057, 227028, 235520, 236032, 260114, 454056, 454933, 471040, 472064, 472533, 520228, 908112, 909866, 942080, 944128, 945066, 1040456, 1816224, 1819732, 1884160, 1888256, 1890132, 2034537

Offset: 1

Author

Antti Karttunen, Nov 01 2016

Keywords

• nonn
• base

Comments

A277807 lists the "sporadic" solutions to A048720(n, A065621(n)) = k^2, i.e., those solutions where n is not in A023758 (not yet proved: these are precisely those solutions where k <> n). This sequence gives the corresponding values of k.

If n is included in this sequence, then also 2n is included (and vice versa), thus the sequence is infinite and wholly determined by its odd terms.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..57
• Index entries for sequences related to binary expansion of n

Crossrefs

Cf. A000196, A023758, A048720, A065621, A277699, A277704, A277807.

Programs

Scheme

(define (A277806 n) (A000196 (A277699 (A277807 n))))

Formula

a(n) = A000196(A277699(A277807(n))).