A055860 - OEIS

A055860

a(n) = A000169(n+1) if n > 0; a(0) = 0.

0, 2, 9, 64, 625, 7776, 117649, 2097152, 43046721, 1000000000, 25937424601, 743008370688, 23298085122481, 793714773254144, 29192926025390625, 1152921504606846976, 48661191875666868481, 2185911559738696531968

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 67

FORMULA

a(0) = 0; for n >= 1, a(n) = (n+1)^n.

E.g.f.: -W(-x)/((1+W(-x))*x) - 1 = -(d/dx)W(x) - 1, W(x) principal branch of Lambert's function.

CROSSREFS

Second column of triangle A055858. Cf. A000169, A055858, A000312.

Sequence in context: A325206 A325207 A325208 * A152917 A213236 A000169

Adjacent sequences: A055857 A055858 A055859 * A055861 A055862 A055863

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jun 20 2000

STATUS

approved