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%I #5 Mar 30 2012 17:21:02
%S 1,2,1,3,1,4,1,1,5,1,1,6,1,1,1,7,1,1,1,8,3,1,1,9,3,1,1,10,3,1,1,1,11,
%T 3,1,1,1,12,3,1,1,1,1,13,3,1,1,1,1,14,3,1,1,1,1,15,3,1,1,1,1,16,3,1,1,
%U 1,1,1,17,3,1,1,1,1,1,18,3,1,1,1,1,1,1,19,3,1,1,1,1,1,1,20,3,1,1
%N Irregular triangle read by rows: row n gives successive exponents in prime factorization of A141900(n).
%H David Applegate, <a href="/A142593/a142593a.txt">Maple program which generates this triangle</a> [The command hpat(n); returns the n-th row in an encoded form.]
%H N. J. A. Sloane, <a href="/A142593/a142593b.txt">Rows 1 through 50 of the triangle</a>
%e Triangle begins:
%e 1
%e 2 1
%e 3 1
%e 4 1 1
%e 5 1 1
%e 6 1 1 1
%e 7 1 1 1
%e 8 3 1 1
%e 9 3 1 1
%e 10 3 1 1 1
%e 11 3 1 1 1
%e 12 3 1 1 1 1
%e Row 8 = [8,3,1,1] because A141900(8) = 2^8*3^3*5*7 = 241920.
%Y Cf. A141586, A141900, A142594.
%K nonn,tabf
%O 1,2
%A _David Applegate_, Tim Kunisky (tkunisky(AT)gmail.com), Gerry Manoim (gerrymanoim(AT)gmail.com) and _N. J. A. Sloane_, Sep 25 2008
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