

A107950


Boling's constant, the decimal expansion of Sum_{i>=1} i(i+1) / (2*Product_{j=0..i1} i!/j!).


2



1, 8, 0, 5, 9, 1, 7, 4, 1, 8, 9, 8, 6, 6, 9, 1, 0, 1, 3, 9, 9, 7, 5, 0, 5, 3, 8, 5, 8, 5, 1, 0, 5, 0, 6, 8, 0, 9, 8, 9, 6, 5, 2, 5, 4, 5, 9, 0, 9, 6, 3, 4, 2, 8, 2, 5, 7, 5, 9, 5, 8, 8, 5, 8, 5, 8, 8, 2, 9, 7, 8, 7, 3, 6, 3, 4, 9, 1, 4, 0, 6, 7, 9, 2, 0, 7, 5, 9, 8, 7, 5, 7, 8, 1, 1, 8, 0, 7, 5, 1, 4, 9, 8, 2, 3
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..105.


EXAMPLE

B=1.805917418986691013997505385851050680989652545909634282575958858...


MATHEMATICA

RealDigits[ Sum[i(i + 1)/2/Product[i!/j!, {j, 0, i  1}], {i, 14}], 10, 111][[1]]
Clear[B]; B[m_] := B[m] = N[Sum[i*(1+i)/2*BarnesG[1+i]/i!^i, {i, 1, m}], 105]; m=2; While[B[m] != B[m1], m++]; RealDigits[B[m]][[1]] (* JeanFrançois Alcover, Nov 18 2015 *)


CROSSREFS

Cf. A105658, A107951, A107952.
Sequence in context: A195400 A132034 A190281 * A273634 A121839 A010517
Adjacent sequences: A107947 A107948 A107949 * A107951 A107952 A107953


KEYWORD

cons,nonn


AUTHOR

Robert G. Wilson v, May 28 2005


STATUS

approved



