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 A089317 Prime worms [successive digit differences with absolute value of 4]. 3

%I

%S 151,373,95959,9515959,159595151,159595951,15151595951,15951595151,

%T 95951515159,1515159515951,1515959515951,1515959595151,1595159515151,

%U 1595159595151,9515151515159,9515159515159,9515159595959,9595159515959

%N Prime worms [successive digit differences with absolute value of 4].

%D Carlos Rivera's primepuzzles.net, Puzzle 246

%H Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_246.htm">Puzzle 246. The worm</a>

%F Select prime numbers having the same first and last digits; if the uniform absolute value of successive digit differences is 4, add to sequence.

%e a(1)=373; first and last digits are 3; abs(3-7)=4; abs(7-3)=4; the worm is 3.

%Y This is a subsequence of A048401. Cf. A089291, A089315-A089316, A048398-A048405.

%K easy,nonn,base

%O 0,1

%A _Enoch Haga_, Dec 25 2003

%E More terms from _David Wasserman_, Sep 09 2005

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Last modified August 18 02:34 EDT 2022. Contains 356204 sequences. (Running on oeis4.)