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A066098
Sum of digits of primorial(n).
1
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
OFFSET
0,2
LINKS
FORMULA
a(n) = A007953(A002110(n)).
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) a(n) = { sumdigits(vecprod(primes(n))) } \\ Harry J. Smith, Nov 13 2009
CROSSREFS
Cf. A007953 (sum of digits), A002110 (primorial).
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 to 1 by Harry J. Smith, Nov 13 2009
a(0)=1 prepended by Alois P. Heinz, Dec 14 2024
STATUS
approved