0,4

Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A130918.

a(n) = ceiling(A000108(n)/2) = (A000108(n)+A036987(n))/2.

(MIT Scheme:) (define (A130380 n) (floor->exact (/ (+ (A000108 n) 1) 2)))

Adjacent sequences: A130377 A130378 A130379 this_sequence A130381 A130382 A130383

Sequence in context: A148675 A148676 A105864 this_sequence A097147 A148677 A037127

nonn

Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Jun 11 2007