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A066098 Sum of digits of primorial(n) (A002110). 1
2, 6, 3, 3, 6, 6, 12, 48, 33, 48, 30, 48, 42, 51, 93, 87, 75, 111, 111, 132, 114, 141, 156, 150, 150, 156, 183, 213, 240, 201, 210, 222, 192, 210, 258, 249, 312, 267, 282, 348, 300, 336, 375, 312, 372, 390, 381, 363, 366, 411, 363, 366, 375, 399, 447 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = C*n*log(n) asymptotically with C=1.9...
If the digits are supposed equidistributed, a(n)=9/(2*log(10))*n*log(n) asymptotically, where 9/(2log(10))=1.9543251685... - Benoit Cloitre, Jan 05 2002
MATHEMATICA
Table[ Apply[ Plus, IntegerDigits[ Product[ Prime[i], {i, 1, n} ]]], {n, 1, 55} ]
PROG
(PARI) SumD(x)= { local(s=0); while (x>9, s+=x%10; x\=10); return(s + x) } { p=1; for (n=1, 1000, p*=prime(n); s=SumD(p); write("b066098.txt", n, " ", s) ) } \\ Harry J. Smith, Nov 13 2009
CROSSREFS
Cf. A002110.
Sequence in context: A218256 A198418 A086360 * A299160 A123733 A261069
KEYWORD
nonn,base
AUTHOR
Benoit Cloitre, Dec 30 2001
EXTENSIONS
More terms from Robert G. Wilson v, Dec 31 2001
OFFSET changed from 0,1 to 1,1 by Harry J. Smith, Nov 13 2009
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)