A136022 First differences of A136021.

19, 1028, 63326, 4417267, 336418691, 27095099730, 2264740360646, 194526458511192, 17050085068702458, 1517704371492095702, 136758640772944755122, 12445444666179480674989, 1141852084948606732236114, 105483948921834512942168239

Offset: 1

Author

Enoch Haga, Dec 10 2007, Dec 12 2007

Keywords

• more
• nonn

Examples

			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.

Formula

a(n) = A136021(n)-A136021(n-1).

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