A078828 - OEIS

A078828

Product of all primes contained as binary substrings in binary representation of n.

1, 1, 2, 3, 2, 10, 6, 63, 2, 2, 20, 330, 6, 390, 126, 1323, 2, 34, 4, 114, 20, 100, 660, 159390, 6, 6, 780, 12870, 126, 237510, 2646, 861273, 2, 2, 68, 102, 4, 740, 228, 2394, 20, 820, 200, 141900, 660, 42900, 318780, 157317930, 6, 102, 12, 342, 780, 206700

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..53.

EXAMPLE

n=7: product of the A078827(7)=3 primes as binary substrings in binary representation of 7 -> '111': a(7) = '11'*'11'*'111' = 3*3*7 = 63.

CROSSREFS

Cf. A078827, A078822, A007088.

Sequence in context: A205393 A075076 A333129 * A247170 A241055 A224418

Adjacent sequences: A078825 A078826 A078827 * A078829 A078830 A078831

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Dec 08 2002

STATUS

approved