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A145831
Log_2 ( A145768( A145830(n))).
2
0, 4, 0, 8, 9, 8
OFFSET
1,2
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
KEYWORD
more,nonn
AUTHOR
M. F. Hasler, Oct 20 2008
STATUS
approved