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A089833
a(n) = A000108(n)*(A000142(n+1)-1).
3
0, 1, 10, 115, 1666, 30198, 665148, 17296851, 518916970, 17643220738, 670442556004, 28158587998814, 1295295050441588, 64764752531737100, 3497296636751245560, 202843204931717665155, 12576278705767060962330
OFFSET
0,3
FORMULA
a(n) = A001813(n) - A000108(n).
PROG
(MIT/GNU Scheme) (define (A089833 n) (* (A000108 n) (-1+ (A000142 (1+ n)))))
CROSSREFS
The first column of A089831.
Sequence in context: A138845 A079678 A233908 * A308667 A251318 A083448
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 05 2003
STATUS
approved