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 A281595 a(n) = (n^n - 3*(n-1)^n + 3*(n-2)^n - (n-3)^n)/6. 1
 0, 0, 0, 1, 10, 125, 1890, 33621, 688506, 15958405, 413066170, 11810819141, 369730963602, 12577271147805, 461980538087250, 18223376862518101, 768327068469302218, 34480595937671194805, 1641060381277816308810, 82562177153973368528901, 4378026144983797903473954 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS MAPLE a := n -> (n^n-3*(n-1)^n+3*(n-2)^n-(n-3)^n)/6: seq(a(n), n=0..20); CROSSREFS Cf. A000312, A045531, A281596. Sequence in context: A230390 A089832 A161170 * A097816 A323877 A079609 Adjacent sequences:  A281592 A281593 A281594 * A281596 A281597 A281598 KEYWORD nonn AUTHOR Peter Luschny, Jan 26 2017 STATUS approved

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Last modified December 1 22:12 EST 2021. Contains 349435 sequences. (Running on oeis4.)