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A167501 Sequence of bits in A167500 (= list of nonzero bits in this sequence, when written in binary). 2
1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sequence A167500 starts 1,2,4,7,... = 1,10,100,111,.... when written in binary (A167502). This sequence lists the bits one by one, MSB first: 1,1,0,1,0,0,1,1,1,...; by definition A167500 lists the nonzero terms of this function, and reciprocally this sequence is the characteristic function of A167500.

LINKS

Table of n, a(n) for n=1..105.

PROG

(PARI) a=b=[]; for(n=1, 30, #b >= n & for( i=a[n-1]+1, #b, b[i] & (a=concat(a, i)) & break); #a<n & a=concat(a, #b+1); b=concat(b, binary( a[n] ))); b

CROSSREFS

Cf. A167500 (lists nonzero terms in this sequence), A167502.

Sequence in context: A176890 A164057 A140820 * A185175 A147612 A141735

Adjacent sequences:  A167498 A167499 A167500 * A167502 A167503 A167504

KEYWORD

base,nonn

AUTHOR

M. F. Hasler, Nov 05 2009

STATUS

approved

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Last modified August 19 07:12 EDT 2017. Contains 290794 sequences.