1,1

A006519 and A003484 differ only at every 16-th term; this sequence forms the nonzero differences. Records form A101120. Equals the XOR BINOMIAL transform of A101122.

a(n) = A006519(16*n) - A003484(16*n) for n>=1. a(2*n-1) = 7 for n>=1.

(PARI) {a(n)=2^valuation(16*n, 2)-(8*(valuation(16*n, 2)\4)+2^(valuation(16*n, 2)%4))}

Cf. A003484, A006519, A101120, A101122.

Sequence in context: A111878 A082826 A130740 this_sequence A070412 A055575 A041090

Adjacent sequences: A101116 A101117 A101118 this_sequence A101120 A101121 A101122

nonn

Simon Plouffe (plouffe(AT)math.uqam.ca) and Paul D. Hanna (pauldhanna(AT)juno.com), Dec 02 2004