1,2

Table of n, a(n) for n=1..100.

Steven Finch, Pattern-Avoiding Permutations [Broken link?]

Steven Finch, Pattern-Avoiding Permutations [Cached copy, with permission]

Solution to sqrt(Pi/2)*erf(x/sqrt(2)) = 1.

1.2755477364172...

RealDigits[Sqrt[2]*InverseErf[Sqrt[2/Pi]], 10, 100] // First

Cf. A052319, A071075, A111004, A200404, A263885.

Sequence in context: A217102 A021788 A019640 * A119929 A195070 A151856

Adjacent sequences: A240882 A240883 A240884 * A240886 A240887 A240888

nonn,cons

Jean-François Alcover, Apr 14 2014

approved