1,2
Mathematical problemsProblem number 169
4=(1+1+2=2+2=4) thus s(4)=3
Sequence in context: A071912 A070940 A020651 this_sequence A002487 A060162 A026730
Adjacent sequences: A160229 A160230 A160231 this_sequence A160233 A160234 A160235
nonn
Knut Angstrom (angstrom.knut(AT)telia.com), May 04 2009, May 05 2009
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