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A145831 Log_2 ( A145768( A145830(n))). 2
0, 4, 0, 8, 9, 8 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 24 16:42 EST 2020. Contains 332209 sequences. (Running on oeis4.)