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A156629
Column 4 of square array A156628.
2
1, 5, 28, 181, 1333, 11029, 101351, 1024949, 11320359, 135679037, 1754890039, 24375607333, 362034474975, 5727314152237, 96171016597079, 1708678290956405, 32029999992261615, 631834430396575613, 13084795597366612231
OFFSET
0,2
CROSSREFS
Sequence in context: A324352 A006157 A179326 * A331797 A123776 A070779
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Feb 17 2009
EXTENSIONS
More terms from Paul D. Hanna, Feb 20 2009
STATUS
approved