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 A101900 Column 0 of triangular matrix A101897, in which column k equals column 0 of A101897^(k+1) and where the n-th row sums are zero for n>0. 4
 1, -1, 1, -2, 5, -17, 71, -357, 2101, -14203, 108609, -927961, 8769087, -90874197, 1025292311, -12516360103, 164433702745, -2313858448075, 34730232119381, -553983478001961, 9359820238735507, -167004393073794933, 3138414712193291915, -61966152586833353847 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 REFERENCES Isak Hilmarsson, Ingibjorg Jonsdottir, Steinunn Sigurdardottir and Sigridur Vidarsdottir, Wilf-classification of mesh patterns of short length, http://skemman.is/stream/get/1946/9181/22991/4/Wilf-classification_of_mesh_patterns_of_short_length.pdf. LINKS CROSSREFS Cf. A101897, A101898, A101899, A101901. Sequence in context: A143382 A057219 A084869 * A005966 A082282 A005967 Adjacent sequences:  A101897 A101898 A101899 * A101901 A101902 A101903 KEYWORD sign AUTHOR Paul D. Hanna, Dec 20 2004 STATUS approved

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