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A179770
The fourth central column of triangle A122242, i.e., A179761(4), A179761(11), A179761(20), A179761(31), ...
4
0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0
OFFSET
1,1
LINKS
FORMULA
a(n) = A179761(A028875(n+2)).
CROSSREFS
Cf. A179771-A179774, and also A179775, A179830.
Sequence in context: A373253 A377988 A104121 * A189078 A257834 A173950
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 03 2010
STATUS
approved