1,1

Also an interesting triangle read by row: See tabl.

Table of n, a(n) for n=1..78.

Index entries for characteristic functions

Index entries for zeta function.

a(30)=1 because 30 is the nearest integer to imaginary part of 4th nontrivial zero of Riemann zeta function.

See A002410 for more information. Cf. A058303, A065434, A065452, A065453.

Sequence in context: A216038 A011728 A297043 * A234323 A162782 A011727

Adjacent sequences: A133007 A133008 A133009 * A133011 A133012 A133013

easy,nonn,tabl

Omar E. Pol, Sep 13 2007

approved