

A219961


First differences of A219960.


3



314, 11, 335, 110, 162, 25, 94, 47, 119, 21, 98, 377, 46, 97, 1, 151, 133, 97, 23, 194, 23, 53, 255, 5, 2, 24, 27, 21, 228, 238, 18, 47, 40, 64, 22, 48, 12, 56, 107, 22, 12, 86, 68, 89, 26, 200, 39, 30, 2, 95, 14, 21, 189, 21, 59, 19, 27, 63, 7, 44, 98, 40
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OFFSET

1,1


COMMENTS

Conjecture: 1 appears infinitely often in this sequence (indicating an infinite number of pairs of consecutive integers in the parent sequence), despite very few appearances compared with A219552, which is derived from a very similar process.


LINKS

Carl R. White, Table of n, a(n) for n = 1..10000


MATHEMATICA

f[n_] := Ceiling[Sqrt[n]]*(Ceiling[Sqrt[n]]^2  n); t = Select[Range[10000], NestWhileList[f, #, UnsameQ, All][[1]] > 0 &]; Differences[t] (* T. D. Noe, Dec 04 2012 *)


CROSSREFS

Cf. A219960, A219552, A219962
Sequence in context: A068650 A106156 A286289 * A107116 A107115 A045290
Adjacent sequences: A219958 A219959 A219960 * A219962 A219963 A219964


KEYWORD

nonn


AUTHOR

Carl R. White, Dec 02 2012


STATUS

approved



