A145831 Log_2 ( A145768( A145830(n))).

0, 4, 0, 8, 9, 8

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Prog

(PARI) an=0; for( i=1, 10^7, an=bitxor(an, i^2); an & an==1<<valuation(an, 2) & print1(valuation(an, 2)", "))

Crossrefs

A145830 = A145768 intersect A000079. A145768(A145830(n)) = 2^a(n). See also A145827-A145829.

Sequence in context: A309038 A159468 A010769 * A324482 A216406 A152990

Adjacent sequences: A145828 A145829 A145830 * A145832 A145833 A145834

Keyword

more,nonn

Author

M. F. Hasler, Oct 20 2008

Status

approved