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A000232
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Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).
(Formerly M2718 N1089)
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2
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3, 8, 14, 14, 25, 24, 23, 22, 25, 59, 98, 97, 98, 97, 174, 176, 176, 176, 176, 291, 290, 289, 740, 874, 873, 872, 873, 872, 871, 870, 869, 868, 867, 866, 2180, 2179, 2178
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Related to Gilbreath conjecture.
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REFERENCES
| R. B. Killgrove and K. E. Ralston, On a conjecture concerning the primes, Math. Comp., 13 (1959), 121-122.
W. Sierpi\'{n}ski, A Selection of Problems in the Theory of Numbers. Macmillan, NY, 1964, p. 35.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..274
Chris Caldwell, Gilbreath's conjecture
Albert N. Debono, NUMBERS AND COMPUTERS (11)
Eric Weisstein's World of Mathematics, Gilbreath's Conjecture
Index entries for primes, gaps between
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FORMULA
| a(n) = A036277(n) - 1 - T. D. Noe, Feb 03 2007
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CROSSREFS
| Cf. A001549.
Sequence in context: A153891 A056402 A106386 * A067789 A180867 A063218
Adjacent sequences: A000229 A000230 A000231 * A000233 A000234 A000235
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 18 2002
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