A136517 a(0) = 3; for n > 0, break up decimal expansion of Pi into chunks of increasing lengths; leading zeros are not printed.

3, 1, 41, 592, 6535, 89793, 238462, 6433832, 79502884, 197169399, 3751058209, 74944592307, 816406286208, 9986280348253, 42117067982148, 86513282306647, 938446095505822, 31725359408128481, 117450284102701938, 5211055596446229489

Offset: 0

Author

N. J. A. Sloane, Apr 21 2008

Keywords

• nonn
• base
• easy

References

• Sylvia Nasar, A Beautiful Mind (1998), p. 210.
• Clifford A. Pickover, A Passion for Mathematics, Wiley, 2005; see p. 64.

Links

• Nathaniel Johnston, Table of n, a(n) for n = 0..500

Crossrefs

Cf. A000796, A081368, A090897.

Programs

Maple

with(StringTools): lim:=23: s:=convert(evalf[lim^2](Pi-3),string): printf("3, "): for n from 1 to lim do printf("%d, ",parse(SubString(s,(n-1)*n/2+2..n*(n+1)/2+1))); od: # Nathaniel Johnston, May 08 2011

Mathematica

Join[{3},FromDigits/@With[{p=RealDigits[Pi,10,220][[1]]},Table[ Take[ p, {(n(n-1))/2+2,(n(n-1))/2+1+n}],{n,20}]]] (* Harvey P. Dale, Aug 20 2011 *)

Extensions

Extended by Nathaniel Johnston, May 08 2011