

A086992


Product of nonzero digits in nth row of Pascal's triangle.


1



1, 1, 2, 9, 96, 25, 1800, 44100, 103219200, 3869835264, 128000, 104976000000, 3071875232563200, 7050692013745766400, 626913312768, 332150625000000000000, 1292730125539029811200
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OFFSET

1,3


LINKS



EXAMPLE

a(6) = 25 because the digits in the 5th row of Pascal's triangle are 1,5,(1,0),(1,0),5,1, the product of the nonzero terms is 25.  Richard M. Green, Feb 12 2014


MATHEMATICA

A086992[n_]:= Times @@ DeleteCases[0]@Flatten@IntegerDigits@Table[Binomial[n, k], {k, 0, n}] (* JungHwan Min, Dec 07 2015 *)


PROG

(PARI) A051801(n)=my(v=select(k>k>1, digits(n))); prod(i=1, #v, v[i])


CROSSREFS



KEYWORD

base,easy,nonn


AUTHOR



STATUS

approved



