A293218 a(n) = A007913(A292270(n)).

1, 1, 1, 1, 13, 1, 1, 1, 38, 1, 3, 26, 31, 1, 1, 1, 103, 73, 1, 42, 14, 7, 91, 3, 58, 14, 1, 170, 303, 1, 1, 1, 66, 1, 385, 91, 93, 301, 65, 563, 1093, 1, 11, 355, 38, 118, 83, 1, 1254, 763, 1, 1043, 39, 1, 249, 141, 238, 19, 71, 43, 133, 11, 781, 1, 649, 1, 554, 1081, 614, 1, 1633, 5, 317, 1398, 1, 269, 626, 10, 527, 1285, 1191, 1

Offset

0,5

Links

Antti Karttunen, Table of n, a(n) for n = 0..10000

Formula

a(n) = A007913(A292270(n)).

Prog

(PARI)
A000265(n) = (n >> valuation(n, 2));
A006519(n) = 2^valuation(n, 2);
A292270(n) = { my(x = n+n+1, z = ((1+x)/A006519(1+x)), m = A000265(1+x)); while(m!=1, z += ((x+m)/A006519(x+m)); m = A000265(x+m)); z; };
A293218(n) = core(A292270(n));
(Scheme) (define (A293218 n) (A007913 (A292270 n)))

Crossrefs

Cf. A002326, A007913, A292270, A292947, A293219.

Cf. A292938 (gives the positions of ones).

Sequence in context: A332018 A010227 A010228 * A225699 A010226 A066834

Adjacent sequences: A293215 A293216 A293217 * A293219 A293220 A293221

Keyword

nonn

Author

Antti Karttunen, Oct 06 2017

Status

approved