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Beginning column count at 1, the index of the column which contains n in Clark Kimberling's even first column Stolarsky array.
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%I #12 Jul 21 2017 00:56:44

%S 1,2,3,1,4,1,2,5,2,1,3,1,6,1,3,1,2,4,2,1,7,1,2,4,2,1,3,1,5,1,3,1,2,8,

%T 2,1,3,1,5,1,3,1,2,4,2,1,6,1,2,4,2,1,3,1,9,1,3,1,2,4,2,1,6,1,2,4,2,1,

%U 3,1,5,1,3,1,2,7,2,1,3,1,5,1,3,1,2,4

%N Beginning column count at 1, the index of the column which contains n in Clark Kimberling's even first column Stolarsky array.

%H C. Kimberling, <a href="http://www.fq.math.ca/Scanned/32-4/kimberling.pdf">The first column of an interspersion</a>, Fibonacci Quarterly 32 (1994), pp. 301-314.

%e The even first column stolarsky array (EFC array), northwest corner:

%e 1......2.....3.....5.....8....13....21....34....55....89...144 ...

%e 4......7....11....18....29....47....76...123...199...322...521

%e 6......9....15....24....39....63...102...165...267...432...699

%e 10....17....27....44....71...115...186...301...487...788..1275

%e 12....19....31....50....81...131...212...343...555...898..1453

%e 14....23....37....60....97...157...254...411...665..1076..1741

%e 16....25....41....66...107...173...280...453...733..1186..1919

%e 20....33....53....86...139...225...364...589...953..1542..2673

%e 22....35....57....92...149...241...390...631..1021..1652..2673

%K nonn

%O 1,2

%A _Casey Mongoven_, Nov 07 2011