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A141701
Triangle read by rows: A001414 interleaved with (k-1) zeros.
0
0, 2, 0, 3, 0, 0, 4, 2, 0, 0, 5, 0, 0, 0, 0, 5, 3, 2, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 6, 4, 0, 2, 0, 0, 0, 0, 6, 0, 3, 0, 0, 0, 0, 0, 0, 7, 5, 0, 0, 2, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 5, 4, 3, 0, 2, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 7, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0
OFFSET
1,2
COMMENTS
A005843 seems to begin over an over again at row indices equal to powers of two. Similarly A008585 repeats itself at row indices equal to powers of three.
PROG
(Excel) =if(row()>=column(); if(mod(row(); column())=0; lookup(row()/column(); A000027; A001414; 0); ")
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Mats Granvik, Jun 30 2008, Jul 01 2008
STATUS
approved