A088576 Position of the first location of n in the decimal expansion of e.

14, 3, 1, 18, 11, 12, 21, 2, 4, 13, 196, 201, 371, 28, 224, 202, 95, 89, 3, 109, 112, 88, 253, 17, 34, 93, 31, 1, 5, 132, 72, 190, 111, 143, 144, 18, 20, 271, 86, 107, 67, 125, 98, 135, 240, 11, 104, 26, 229, 35, 236, 94, 16, 19, 77, 302, 154, 39, 326, 12, 21, 243, 33

Offset

0,1

Comments

Except for a(0), the same as A051238.

Links

T. D. Noe, Table of n, a(n) for n = 0..10000

Eric Weisstein's World of Mathematics, e Digits

Eric Weisstein's World of Mathematics, Constant Digit Scanning

Example

The first 7 is in the 2nd position of the digits of e, so a(7) = 2.

Prog

(PARI) trajedigitsd(n, m) = { default(realprecision, 6000); p = exp(1)*10^5000; v = Vec(Str(p)); for(d=0, m, for(x=1, n, if(d<10, y = eval(v[x]), if(d<100, y = eval(v[x])*10 + eval(v[x+1]), if(d<1000, y = eval(v[x])*100 + eval(v[x+1])*10 + eval(v[x+2]), y = eval(v[x])*1000 + eval(v[x+1])*100 + eval(v[x+2])*10 + eval(v[x+3]) ); ); ); if(y == d, print1(x", "); break); ); ) }

Crossrefs

Cf. A001113 (decimal expansion of e).

Cf. A036900 (number of digits in the decimal expansion of e that must scanned to get all n-digit strings).

Cf. A032445 (positions in pi), A088577 (positions in phi).

Sequence in context: A303380 A242061 A040189 * A204159 A040190 A317314

Adjacent sequences: A088573 A088574 A088575 * A088577 A088578 A088579

Keyword

nonn,base

Author

Cino Hilliard, Nov 19 2003

Status

approved