The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A207409 Triangular array: T(k,j)=prime(k)(mod prime(j)), 1<=j
 1, 1, 2, 1, 1, 2, 1, 2, 1, 4, 1, 1, 3, 6, 2, 1, 2, 2, 3, 6, 4, 1, 1, 4, 5, 8, 6, 2, 1, 2, 3, 2, 1, 10, 6, 4, 1, 2, 4, 1, 7, 3, 12, 10, 6, 1, 1, 1, 3, 9, 5, 14, 12, 8, 2, 1, 1, 2, 2, 4, 11, 3, 18, 14, 8, 6, 1, 2, 1, 6, 8, 2, 7, 3, 18, 12, 10, 4, 1, 1, 3, 1, 10, 4, 9, 5, 20, 14, 12, 6, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Top edge:  A001223 Row sums:  A033955 Row maxs:  A039731 LINKS Robert Israel, Table of n, a(n) for n = 1..10011 (first 141 rows, flattened) EXAMPLE Top 7 rows: 1............. 3 mod 2 1 2............5 mod 2, 5 mod 3 1 1 2..........7 mod 2, 7 mod 3, 7 mod 4 1 2 1 4 1 1 3 6 2 1 2 2 3 6 4 1 1 4 5 8 6 2 MAPLE P := select(isprime, [\$1..100]): seq(seq(P[k] mod P[j], j=1..k-1), k=1..nops(P)); # Robert Israel, May 01 2017 MATHEMATICA t = Table[Mod[Prime[k + 1], Prime[j]], {k, 1, 15}, {j, 1, k }]; Flatten[t]   (* A207409 as a sequence *) TableForm[t] (* A207409 as a triangle *) CROSSREFS Cf. A000040. Sequence in context: A134838 A049843 A131374 * A013632 A080121 A122901 Adjacent sequences:  A207406 A207407 A207408 * A207410 A207411 A207412 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Feb 17 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 26 13:04 EDT 2022. Contains 354883 sequences. (Running on oeis4.)