A214736 Least m>0 such that n-m divides n+1+m.

1, 2, 1, 4, 5, 2, 7, 8, 3, 10, 7, 4, 13, 14, 5, 10, 17, 6, 19, 20, 7, 22, 17, 8, 25, 16, 9, 28, 29, 10, 19, 32, 11, 34, 35, 12, 27, 38, 13, 40, 25, 14, 43, 32, 15, 28, 47, 16, 49, 50, 17, 52, 53, 18, 55, 34, 19, 42, 49, 20, 37, 62, 21, 64, 47, 22, 67, 68, 23, 58, 43

Offset

2,2

Links

Clark Kimberling, Table of n, a(n) for n = 2..1000

Example

Write x#y if x|y is false; then 9#12, 8#13, and 7|14, so a(10) = 3.

Mathematica

Table[m = 1; While[! Divisible[n+1+m, n - m], m++]; m, {n, 2, 100}]

Crossrefs

Cf. A075861.

Sequence in context: A038502 A106610 A182398 * A051176 A145064 A209166

Adjacent sequences: A214733 A214734 A214735 * A214737 A214738 A214739

Keyword

nonn,easy

Author

Clark Kimberling, Jul 28 2012

Status

approved