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A305387
Indicator function of A140102.
4
1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1
OFFSET
1
COMMENTS
a(n) = 1 iff n is in A140102.
FORMULA
A305385(n)+A305386(n) = A305387(n)+A305388(n) = 1 for all n.
CROSSREFS
The indicator functions for A140100, A140101, A140102, A140103 are given in A305385, A305386, A305387, A305388.
Sequence in context: A323000 A005713 A188031 * A085241 A105368 A138019
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 21 2018
STATUS
approved