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A025134 a(n) = n-th elementary symmetric function of C(n,0), C(n,1), ..., C(n,n). 2
1, 2, 5, 24, 256, 6500, 407700, 64538880, 26120421376, 27252226455552, 73710997920000000, 519006451497395400000, 9544405721673726148608000, 459675814976476432499714440320, 58118199039973755223479833897882880, 19330456644008414104033256172750000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..50

PROG

(PARI)

ESym(u)={my(v=vector(#u+1)); v[1]=1; for(i=1, #u, my(t=u[i]); forstep(j=i, 1, -1, v[j+1]+=v[j]*t)); v}

a(n)={ESym(binomial(n))[n+1]} \\ Andrew Howroyd, Dec 19 2018

CROSSREFS

Sequence in context: A303108 A052808 A137157 * A076534 A095708 A120759

Adjacent sequences:  A025131 A025132 A025133 * A025135 A025136 A025137

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Terms a(10) and beyond from Andrew Howroyd, Dec 19 2018

STATUS

approved

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Last modified April 18 06:48 EDT 2019. Contains 322209 sequences. (Running on oeis4.)