A090898 Index of first occurrence of the first n digits of e in the decimal expansion of Pi.

6, 28, 241, 11706, 28024, 33789, 1526800, 73154827, 246890641, 6026562951, 45111908393, 1016065419627, 8838254734240, 56004963308118, 56004963308118

Offset

1,1

Comments

a(9) is the first position in the decimal expansion of Pi at which the string "271828182" begins.

References

C. A. Pickover, "The Mathematics of Oz", p. 337.

Links

Table of n, a(n) for n=1..15.

David G. Andersen, The Pi-Search Page.

Peter Trüb, 22.4 trillion digits of pi

Eric Weisstein's World of Mathematics, Pickover's Sequence

Example

a(1) = 6 because the first digit of e, 2, in the decimal expansion of Pi is in position 6.
a(2) = 28 because '27' appears in the decimal expansion of Pi beginning at the 28th position, .141592653589793238462643383'27'95028841971693993751.

Crossrefs

Cf. A000796, A001113, A115234.

Sequence in context: A206708 A336565 A216413 * A134872 A281003 A049603

Adjacent sequences: A090895 A090896 A090897 * A090899 A090900 A090901

Keyword

nonn,base,more

Author

Michael Joseph Halm, Feb 26 2004

Extensions

a(9)-a(13) from Dmitry Petukhov, Jan 15 2020

a(14)-a(15) from Dmitry Petukhov, Sep 19 2022

Status

approved