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%I #7 Aug 26 2022 16:53:19
%S 4,7,8,11,13,16,19,12,22,26,29,34,37,43,46,53,17,18,56,64,67,76,79,89,
%T 92,103,106,118,23,25,121,134,137,151,154,169,172,188,191,208,24,211,
%U 229,30,33,232,251,254,274,277,298,301,323,326,349,352,376,379,404,38
%N Irregular triangle read by rows: row n (n>=2) lists positions in the sequence A007318 where n appears.
%e In A007318, the number 2 appears in position 4, so the first row is 4. The number 3 appears in positions 7 and 8 in A007318, so the second row is 7, 8.
%e The irregular triangle begins:
%e 4
%e 7, 8
%e 11, 13
%e 16, 19
%e 12, 22, 26
%e 29, 34
%e 37, 43
%e 46, 53
%e ...
%Y Cf. A003015, A003016, A007318, A059233.
%K easy,nonn,tabf
%O 2,1
%A _Nick Hobson_, Mar 01 2007
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