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Revision History for A216415 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A216415 a(n) = smallest positive m such that 2n-1 | 10^m-1, or 0 if no such m exists.
(history; published version)
#49 by Alois P. Heinz at Wed Feb 20 09:56:17 EST 2019
STATUS

proposed

approved

#48 by Georg Fischer at Wed Feb 20 09:49:03 EST 2019
STATUS

editing

proposed

#47 by Georg Fischer at Wed Feb 20 09:48:50 EST 2019
KEYWORD

sign

nonn

STATUS

approved

editing

Discussion
Wed Feb 20 09:49
Georg Fischer: Previous escape value was -1.
#46 by Charles R Greathouse IV at Fri Aug 19 00:28:00 EDT 2016
PROG

(PARI) for(i=0, 200, i++; if(i%5==0, print1(0", "), print1(znorder(Mod(10, i))", "))) [_))", "))) \\ _V. Raman_, Nov 22 2012]

(PARI) for(i=0, 200, i++; m=0; for(x=1, i, if(((10^x-1))%i==0, m=x; break)); print1(m", ")) [_", ")) \\ _V. Raman_, Nov 22 2012]

Discussion
Fri Aug 19 00:28
OEIS Server: https://oeis.org/edit/global/2548
#45 by T. D. Noe at Fri Nov 30 14:11:51 EST 2012
STATUS

editing

approved

#44 by T. D. Noe at Fri Nov 30 14:11:45 EST 2012
PROG

(PARI) for(i=0, 200, i++; if(i%5==0, print1(0", "), print1(znorder(Mod(10, i))", "))) [added by the author, ))", "))) [_V. Raman_, Nov 22 2012]

(PARI) for(i=0, 200, i++; m=0; for(x=1, i, if(((10^x-1))%i==0, m=x; break)); print1(m", ")) [added by the author, ", ")) [_V. Raman_, Nov 22 2012]

#43 by T. D. Noe at Fri Nov 23 13:31:37 EST 2012
STATUS

proposed

editing

#42 by V. Raman at Fri Nov 23 02:33:27 EST 2012
STATUS

editing

proposed

#41 by V. Raman at Thu Nov 22 13:36:49 EST 2012
PROG

(PARI) for(i=0, 200, i++; if(i%5==0, print1(0", "), print1(znorder(Mod(10, i))", "))) [added by the author, Nov 22 2012]

(PARI) for(i=0, 200, i++; m=0; for(x=1, i, if(((10^x-1))%i==0, m=x; break)); print1(m", ")) [added by the author, Nov 22 2012]

STATUS

approved

editing

#40 by Alois P. Heinz at Sat Oct 20 13:47:18 EDT 2012
STATUS

proposed

approved

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Last modified August 31 15:16 EDT 2024. Contains 375572 sequences. (Running on oeis4.)