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A129785 a(n+1) = Product from k=0 to k=n of 1 + C(n,k)a(k), with a(0) = 1 and C(n,k)the ordinary binomial coefficient. 0
1, 2, 6, 70, 18886, 3534626502 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

A product analog of the Bell numbers.

REFERENCES

H. W. Gould, A product analog of the Bell numbers, unpublished manuscript, Jun 03 2007.

EXAMPLE

a(5) = (1+1)(1+8)(1+36)(1+280)(1+18886)

CROSSREFS

Sequence in context: A136268 A030242 A037293 * A000896 A103527 A180982

Adjacent sequences:  A129782 A129783 A129784 * A129786 A129787 A129788

KEYWORD

easy,nonn

AUTHOR

Henry W. Gould (gould(AT)math.wvu.edu), Jun 03 2007

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Last modified February 17 16:49 EST 2012. Contains 206058 sequences.