The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A000961

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A000961

Powers of primes. Alternatively, 1 and the prime powers (p^k, p prime, k >= 1).
(history; published version)

#218 by N. J. A. Sloane at Mon Aug 05 09:20:43 EDT 2024

STATUS

proposed

approved

#217 by François Huppé at Wed Jul 31 02:58:37 EDT 2024

STATUS

editing

proposed

#216 by François Huppé at Wed Jul 31 02:58:04 EDT 2024

FORMULA

Sum_{k=1..n} 1/a(k) ~ log(log(a(n))) + 1 + A077761 + A136141. - François Huppé, Jul 31 2024

#215 by François Huppé at Wed Jul 31 02:52:14 EDT 2024

FORMULA

Sum_{k=1..n} 1/a(k) ~ log(log(a(n))) + 1 + A077761 + A136141. - François Huppé, Jul 31 2024

#214 by François Huppé at Wed Jul 31 02:51:18 EDT 2024

FORMULA

Sum_{k=1..n} 1/a(k) ~ log(log(a(n))) + 1 + A077761 + A136141. - François Huppé, Jul 31 2024

STATUS

approved

editing

#213 by Michael De Vlieger at Tue Jul 23 14:58:16 EDT 2024

STATUS

reviewed

approved

#212 by Andrew Howroyd at Tue Jul 23 11:00:18 EDT 2024

STATUS

proposed

reviewed

#211 by Michel Marcus at Tue Jul 23 03:53:23 EDT 2024

STATUS

editing

proposed

#210 by Michel Marcus at Tue Jul 23 03:53:19 EDT 2024

COMMENTS

a(n) = A025473(n)^A025474(n). - David Wasserman, Feb 16 2006

a(n) = A117331(A117333(n)). - Reinhard Zumkeller, Mar 08 2006

FORMULA

a(n) = A025473(n)^A025474(n). - David Wasserman, Feb 16 2006

a(n) = A117331(A117333(n)). - Reinhard Zumkeller, Mar 08 2006

STATUS

proposed

editing

#209 by Chai Wah Wu at Tue Jul 23 00:27:14 EDT 2024

STATUS

editing

proposed