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A255134 First differences of A097764. 4
12, 11, 9, 28, 36, 44, 52, 20, 40, 68, 76, 84, 92, 100, 53, 55, 116, 124, 132, 140, 148, 156, 128, 36, 172, 180, 188, 196, 204, 212, 209, 11, 228, 11, 225, 244, 252, 260, 268, 276, 284, 292, 300, 56, 252, 316, 324, 332, 340, 348, 356, 364, 372, 380, 45, 343 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A097764(n+1) - A097764(n);

conjecture: a(n) > 1; empirically: Min{a(n): 1 <= n <= 10^7} = 9;

a(A255137(n)) = A255136(n) and a(m) < A255136(n) for m < A255137(n).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

MATHEMATICA

nMax = 10000; n = 1; lst = Reap[While[p = Prime[n]; p^p <= nMax, k = 1; While[(k*p)^p <= nMax, Sow[(k*p)^p]; k++]; n++]][[2, 1]]; Union[lst] // Differences (* Jean-Fran├žois Alcover, Oct 20 2016, after T. D. Noe *)

PROG

(Haskell)

a255134 n = a255134_list !! (n-1)

a255134_list = zipWith (-) (tail a097764_list) a097764_list

CROSSREFS

Cf. A097764, record values and where they occur: A255136, A255137.

Sequence in context: A087868 A233513 A175042 * A109065 A022968 A023454

Adjacent sequences:  A255131 A255132 A255133 * A255135 A255136 A255137

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 14 2015

STATUS

approved

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Last modified September 27 19:04 EDT 2020. Contains 337388 sequences. (Running on oeis4.)