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Table of n, a(n) for n=0..101.
a(n) = A004247[n]-A048720[n]
"Zoomed in" variant: A061859, the diagonals 3, 5 and 7 are given by A048728-A048730.
Sequence in context: A089418 A274981 A124856 * A005873 A217511 A178990
Adjacent sequences: A061855 A061856 A061857 * A061859 A061860 A061861
Antti Karttunen, May 11 2001