0,6

a(0)=0; thereafter if n occurs as a term of A055938, a(n)=its position in A055938, otherwise zero. This works as an "inverse" function for A055938 in a sense that a(A055938(n)) = n for all n.

a(n)*A213714(n) = 0 for all n.

Antti Karttunen, Table of n, a(n) for n = 0..8191

Indranil Ghosh, Python program to generate the sequence

a(n) = (1-A079559(n)) * A234016(n).

(Scheme) (define (A234017 n) (* (- 1 (A079559 n)) (A234016 n)))

Cf. also A079559, A234016, A055938, A213714, A233275, A233277.

Sequence in context: A292596 A011023 A284610 * A182057 A260928 A097027

Adjacent sequences: A234014 A234015 A234016 * A234018 A234019 A234020

nonn

Antti Karttunen, Dec 18 2013

approved