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 A328550 a(n) is the least prime p such that the next prime after p with the same last digit as p is p+10*n. 1
 3, 11, 29, 313, 113, 397, 331, 269, 997, 1129, 2861, 4271, 4657, 13451, 10687, 31489, 14969, 10891, 38011, 63113, 39397, 70621, 55373, 57331, 46273, 141863, 78283, 130987, 99233, 27283, 379081, 711371, 349471, 474583, 701033, 155893, 285997, 250307, 988937, 869551, 1118441, 425417, 2385157 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..100 EXAMPLE a(3) = 29 because the next prime after 29 ending in 9 is 29+3*10=59. MAPLE V:= Vector(50): count:= 0: L:= Vector(9): p:= 2: while count < 50 do p:= nextprime(p); d:= p mod 10; if L[d] = 0 then L[d]:= p else m:= (p - L[d])/10; if m <= 100 and V[m] = 0 then V[m]:= L[d]; count:= count+1; fi; L[d]:= p; fi od: convert(V, list); CROSSREFS Sequence in context: A259594 A293010 A236467 * A179234 A338051 A009183 Adjacent sequences: A328547 A328548 A328549 * A328551 A328552 A328553 KEYWORD nonn,base AUTHOR J. M. Bergot and Robert Israel, Jan 19 2021 STATUS approved

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Last modified July 14 05:06 EDT 2024. Contains 374291 sequences. (Running on oeis4.)