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A136022
First differences of A136021.
1
19, 1028, 63326, 4417267, 336418691, 27095099730, 2264740360646, 194526458511192, 17050085068702458, 1517704371492095702, 136758640772944755122, 12445444666179480674989, 1141852084948606732236114, 105483948921834512942168239
OFFSET
1,1
FORMULA
a(n) = A136021(n)-A136021(n-1).
EXAMPLE
a(1)=19 because at 10^0 the prime divisor sum in A136021 is zero, so 19-0=19. From the second sum in A136021, 1047, subtract 19, so that a(2) = 1028.
CROSSREFS
Cf. A136021.
Sequence in context: A192569 A238740 A285862 * A203582 A136021 A195214
KEYWORD
more,nonn
AUTHOR
Enoch Haga, Dec 10 2007, Dec 12 2007
EXTENSIONS
a(6) from R. J. Mathar, Dec 12 2007
Edited by R. J. Mathar, Apr 17 2009
a(7)-a(11) from Max Alekseyev, Jan 30 2012
a(12)-a(14) from Hiroaki Yamanouchi, Jun 29 2014
STATUS
approved