Search: id:A089141
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%I A089141
%S A089141 1,2,1,1,3,1,3,5,4,1,1,13,11,5,1,2,23,37,19,6,1,1,51,107,81,29,7,1,4,97,
%T A089141 332,319,151,41,8,1,1,207,985,1295,749,253,55,9,1,2,401,2992,5161,3774,
%U A089141 1511,393,71,10,1,1,825,8939,20725,19021,9107,2743,577,89,11,1
%N A089141 Square array, read by antidiagonal: T(n,k) = n*T(n,k-1)+(-1)^k*T(n,floor(k/
               2)).
%e A089141 Row 1 :1, 2, 1, 3, 1, 2, 1, 2, 1, 4, 1, 2, 1, ...(A001511).
%e A089141 Row 2 :1, 3, 5, 13, 23, 51, 97, 207, 401, 825, 1627, ...(A089067).
%e A089141 Row 3 :1, 4, 11, 37, 107, 332, 985, 2992, 8939, 26924, 80665, ...
%e A089141 Row 4 :1, 5, 19, 81, 319, 1295, 5161,20725, 82819, 331595, 1326061, ...
%e A089141 Row 5 :1, 6, 29, 151, 749, 3774, 19021, 94954, 475519, 2376846, 11888004, 
               ...
%Y A089141 Cf. A001511, A089067.
%Y A089141 Sequence in context: A092865 A098925 A052920 this_sequence A003687 A104575 
               A046223
%Y A089141 Adjacent sequences: A089138 A089139 A089140 this_sequence A089142 A089143 
               A089144
%K A089141 easy,nonn,tabl
%O A089141 1,2
%A A089141 DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Dec 05 2003

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