A135725 Let d(i) be the i-th digit of the decimal expansion of e = 2.718281828459045235360287471352662..., so that d(0) = 2, d(1) = 7, d(2) = 1, etc. Then a(0) = 2, a(n) = d(d(n)) for n>0.

2, 8, 7, 2, 1, 2, 7, 2, 1, 2, 2, 8, 8, 2, 2, 8, 1, 8, 8, 8, 1, 2, 1, 2, 8, 2, 8, 7, 8, 8, 1, 1, 1, 1, 2, 8, 8, 8, 8, 8, 1, 2, 8, 2, 8, 8, 1, 8, 8, 8, 8, 8, 8, 8, 2, 8, 1, 1, 8, 1, 8, 1, 1, 8, 8, 1, 2, 2, 8, 1, 1, 8, 2, 8, 8, 8, 8, 2, 8, 8, 8, 2, 8, 8, 7, 8, 2, 1, 7, 8, 2, 8, 1, 8, 7, 1, 1, 2, 1

Offset

0,1

Comments

This defines a constant 2.8721272122882... related to e in a peculiar way!

Links

Zak Seidov, Table of n, a(n) for n = 0..999

Crossrefs

Cf. A155912.

Sequence in context: A323459 A282089 A195367 * A265295 A093624 A021352

Adjacent sequences: A135722 A135723 A135724 * A135726 A135727 A135728

Keyword

nonn,base

Author

Zak Seidov and N. J. A. Sloane, Feb 10 2009

Status

approved