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A213542 a(n) = k AND k^k, where k=2*n+1, AND is the bitwise AND operator. 2
1, 3, 5, 7, 9, 3, 13, 15, 17, 3, 5, 7, 25, 3, 13, 31, 33, 35, 5, 7, 41, 35, 13, 15, 49, 35, 37, 7, 57, 35, 45, 63, 65, 67, 69, 7, 9, 3, 13, 15, 81, 67, 5, 7, 25, 3, 77, 31, 97, 35, 5, 7, 41, 99, 77, 15, 113, 35, 37, 7, 57, 99, 109, 127, 129, 131, 133, 7, 137, 131 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..10000

MAPLE

a:= proc(n) local i, k, m, r;

      k:= 2*n+1;

      m:= k &^ k mod (2^(1+ilog2(k)));

      r:= 0;

      for i from 0 while (m>0 or k>0) do

        r:= r +2^i* irem(m, 2, 'm') *irem(k, 2, 'k')

      od; r

    end:

seq(a(n), n=0..100);  # Alois P. Heinz, Jun 21 2012

MATHEMATICA

Table[BitAnd[n, n^n], {n, 1, 141, 2}] (* Harvey P. Dale, Nov 26 2014 *)

PROG

(Python)

print([k**k & k for k in range(1, 222, 2)])

CROSSREFS

Cf. A213541.

Sequence in context: A163125 A167047 A065271 * A029657 A122641 A140977

Adjacent sequences:  A213539 A213540 A213541 * A213543 A213544 A213545

KEYWORD

nonn,base,easy,look,less

AUTHOR

Alex Ratushnyak, Jun 14 2012

STATUS

approved

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Last modified December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)