A099538 Sum of the first n digits of sqrt(2), including the initial "1".

1, 5, 6, 10, 12, 13, 16, 21, 27, 29, 32, 39, 42, 42, 51, 56, 56, 60, 68, 76, 76, 77, 83, 91, 99, 106, 108, 112, 114, 114, 123, 129, 138, 146, 146, 153, 161, 166, 172, 181, 187, 194, 195, 203, 210, 215, 218, 225, 231, 240, 244, 252, 252, 259, 262, 263, 270, 276, 282

Offset: 1

Author

Mark Hudson (mrmarkhudson(AT)hotmail.com), Oct 22 2004

Keywords

• base
• easy
• nonn

Examples

			sqrt(2)=1.41421356237... so the sums are 1, 1+4, 1+4+1, 1+4+1+4, 1+4+1+4+2,...
which gives 1, 5, 6, 10, 12,...
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A002193 for digits of sqrt(2). Other sequences like this one for other constants: A099534-A099537, A039918, A046974, A046975.

Programs

Mathematica

Accumulate[RealDigits[Sqrt[2],10,60][[1]]] (* Harvey P. Dale, May 30 2012 *)