A161445 Numbers n such that A160700(n) = 5.

5, 20, 39, 54, 65, 80, 99, 114, 141, 156, 175, 190, 201, 216, 235, 250, 260, 277, 294, 311, 320, 337, 354, 371, 396, 413, 430, 447, 456, 473, 490, 507, 519, 534, 549, 564, 579, 594, 609, 624, 655, 670, 685, 700, 715, 730, 745, 760, 774, 791, 804, 821, 834

Offset: 1

Author

Reinhard Zumkeller, Jun 10 2009

Keywords

• nonn
• easy

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A161440, A161441, A161442, A161443, A161444, A161446, A161447, A161448, A161449, A161450, A161451, A161452, A161453, A161454, A161455.

Programs

PARI

A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t
a(n)=for(k=16*n-16, 16*n-1, if(a(k)==5, return(k))) \\ Charles R Greathouse IV, Jan 25 2018

Formula

16n - 16 <= a(n) <= 16n - 1. - Charles R Greathouse IV, Jan 25 2018