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 A104645 Difference between the previous and the next primes to x, where x is the number obtained from concatenation of the first n primes (A019518). 0
 10, 6, 20, 24, 24, 60, 18, 48, 100, 48, 156, 74, 88, 68, 42, 126, 366, 106, 186, 136, 228, 104, 30, 246, 52, 218, 814, 58, 536, 174, 90, 924, 180, 298, 120, 330, 96, 508, 504, 60, 762, 588, 330, 138, 552, 726, 452, 634, 660, 354, 534, 1770, 52, 262, 834, 790, 250, 624 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS FORMULA a(n) = A151800(A019518(n)) - A151799(A019518(n)) EXAMPLE For n=4, concatenate(2,3,5,7) gives 2357. The closest other primes are 2371 and 2351 and their difference is a(4)=20. MATHEMATICA <

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Last modified May 22 06:32 EDT 2019. Contains 323478 sequences. (Running on oeis4.)