This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A023688 Numbers with exactly 6 ones in binary expansion. 14
 63, 95, 111, 119, 123, 125, 126, 159, 175, 183, 187, 189, 190, 207, 215, 219, 221, 222, 231, 235, 237, 238, 243, 245, 246, 249, 250, 252, 287, 303, 311, 315, 317, 318, 335, 343, 347, 349, 350, 359, 363, 365, 366, 371, 373 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Appears to give all n such that 8^5 is the highest power of 2 dividing A005148 (n). General conjecture: numbers k such that 8^a is the highest power of 2 dividing A005148 (k) is the same sequence as numbers k such that k has exactly (a+1) 1's in his binary representation. - Benoit Cloitre, Jun 22 2002 LINKS Ivan Neretin, Table of n, a(n) for n = 1..10000 FORMULA a(n+1) = A057168(a(n)). - M. F. Hasler, Aug 27 2014 MATHEMATICA Select[ Range[ 63, 380 ], (Count[ IntegerDigits[ #, 2 ], 1 ]==6)& ] PROG (PARI) is_A023688(n)=hammingweight(n)==6 \\ M. F. Hasler, Aug 27 2014 (PARI) print1(t=2^6-1); for(i=2, 50, print1(", "t=A057168(t))) \\ M. F. Hasler, Aug 27 2014 CROSSREFS Cf. A000079, A018900, A014311, A014312, A014313, A023688, A023689, A023690, A023691 (Hamming weight = 1, 2, ..., 9). Sequence in context: A062375 A253021 A039480 * A118157 A257897 A261108 Adjacent sequences:  A023685 A023686 A023687 * A023689 A023690 A023691 KEYWORD nonn,base,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.