A020767 - OEIS

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A020767

Product_{k=1..n} b(k), where b(k) = binary expansion of k (A007088) but read as if it were a decimal number.

1

1, 1, 10, 110, 11000, 1111000, 122210000, 13565310000, 13565310000000, 13578875310000000, 13714664063100000000, 13865525367794100000000, 15252077904573510000000000, 16792537772935434510000000000, 18639716927958332306100000000000, 20708725506961707192077100000000000

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

EXAMPLE

a(4) = 1*10*11*100 = 11000.

CROSSREFS

Partial products of A007088.

Sequence in context: A305213 A181929 A339713 * A036603 A092500 A092501

Adjacent sequences: A020764 A020765 A020766 * A020768 A020769 A020770

KEYWORD

nonn,base,easy

AUTHOR

Susanna Cuyler, May 23 2003

STATUS

approved