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A067114
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Let N = 24681012141618202224262830..., the concatenation of the even numbers. Then a(n) = sum of first n digits of N.
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1
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(5) = 2+4+6+8+1 = 21.
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MATHEMATICA
| Accumulate[Flatten[IntegerDigits/@Range[2, 66, 2]]] (* From Harvey P. Dale, Nov 09 2011 *)
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CROSSREFS
| Cf. A067112, A067113.
Sequence in context: A152222 A139082 A061078 * A102711 A141406 A045619
Adjacent sequences: A067111 A067112 A067113 * A067115 A067116 A067117
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KEYWORD
| easy,nonn,base
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 08 2002
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EXTENSIONS
| More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
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