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A093659 First column of lower triangular matrix A093658; factorial of the number of 1's in binary expansion of n. 9
1, 1, 1, 2, 1, 2, 2, 6, 1, 2, 2, 6, 2, 6, 6, 24, 1, 2, 2, 6, 2, 6, 6, 24, 2, 6, 6, 24, 6, 24, 24, 120, 1, 2, 2, 6, 2, 6, 6, 24, 2, 6, 6, 24, 6, 24, 24, 120, 2, 6, 6, 24, 6, 24, 24, 120, 6, 24, 24, 120, 24, 120, 120, 720 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

a(n) is the number of compositions of n into distinct powers of 2. - Vladimir Shevelev, Jan 15 2014

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8192

Index entries for sequences related to binary expansion of n

FORMULA

a(2^n) = n! for n>=0. a(2^n+2^m) = a(2^(m+1)) for n>m>=0.

a(n) = A000120(n)! = A000142(A000120(n)).

CROSSREFS

Cf. A093658, A093677, A000120, A000142, A139329.

Sequence in context: A095291 A285003 A284002 * A306714 A200745 A067541

Adjacent sequences:  A093656 A093657 A093658 * A093660 A093661 A093662

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Apr 08 2004

STATUS

approved

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Last modified June 20 10:13 EDT 2019. Contains 324234 sequences. (Running on oeis4.)