0,2

Indexing starts from zero because a(0)=0 is a special case in this sequence.

Antti Karttunen, Table of n, a(n) for n = 0..130

a(n) = A000196(A277016(n)) = A000196(A276573(A277014(n))).

(Scheme) (define (A277015 n) (A000196 (A277016 n)))

Cf. A000196, A002828, A276573, A277014, A277016 (the corresponding squares), A277025 (multiples of four present / 4).

Positions of squares in A277023, zeros in A277024.

Sequence in context: A113645 A311120 A311121 * A311122 A190714 A311123

Adjacent sequences: A277012 A277013 A277014 * A277016 A277017 A277018

nonn

Antti Karttunen, Oct 03 2016

approved