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A123281
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Leading diagonal of A123260.
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2
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1, 1, 1, 5, 19, 205, 1795, 36317, 636331, 23679901, 805351531, 56294206205, 3735873535339, 502757743028605, 65725984337422795, 17309316971673776957, 4485620580863732681131
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1977.
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LINKS
| R. W. Robinson, Table of n, a(n) for n = 1..30
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CROSSREFS
| Sequence in context: A024529 A106991 A102262 * A135171 A058765 A067967
Adjacent sequences: A123278 A123279 A123280 * A123282 A123283 A123284
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 12 2006
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