A067114 Let N = 24681012141618202224262830..., the concatenation of the even numbers. Then a(n) = sum of first n digits of N.

2, 6, 12, 20, 21, 21, 22, 24, 25, 29, 30, 36, 37, 45, 47, 47, 49, 51, 53, 57, 59, 65, 67, 75, 78, 78, 81, 83, 86, 90, 93, 99, 102, 110, 114, 114, 118, 120, 124, 128, 132, 138, 142, 150, 155, 155, 160, 162, 167, 171, 176, 182, 187, 195, 201, 201, 207, 209, 215, 219

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Example

a(5) = 2+4+6+8+1 = 21.

Mathematica

Accumulate[Flatten[IntegerDigits/@Range[2, 66, 2]]] (* Harvey P. Dale, Nov 09 2011 *)

Crossrefs

Cf. A067112, A067113.

Sequence in context: A152222 A139082 A061078 * A102711 A235375 A141406

Adjacent sequences: A067111 A067112 A067113 * A067115 A067116 A067117

Keyword

easy,nonn,base

Author

Amarnath Murthy, Jan 08 2002

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003

Status

approved