1,2

M. Gardner, The Unexpected Hanging and Other Mathematical Diversions. Simon and Schuster, NY, 1969, p. 189.

T. R. Parkin, personal communication.

Popular Computing, Vol. 1 (No. 7, 1973), front cover and page 2.

Illustration showing that a(3) = 37.

Bisection of A006067. Cf. A064941.

Adjacent sequences: A003210 A003211 A003212 this_sequence A003214 A003215 A003216

Sequence in context: A095957 A121834 A083846 this_sequence A090439 A089795 A081971

nonn,nice

njas