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Decimal part of cube root of a(n) starts with 5: first term of runs.
2

%I #12 Aug 03 2020 01:38:34

%S 4,16,43,92,167,275,422,615,858,1158,1521,1954,2461,3049,3724,4493,

%T 5360,6332,7415,8616,9939,11391,12978,14707,16582,18610,20797,23150,

%U 25673,28373,31256,34329,37596,41064,44739,48628,52735,57067,61630

%N Decimal part of cube root of a(n) starts with 5: first term of runs.

%F a(n) = ceiling((n+1/2)^3). - _Benoit Cloitre_, Apr 16 2003

%F (1/8) {8n^3 + 36n^2 + 54n + 31 - (-1)^n - 2(-1)^[(n-1)/2] }. - _Ralf Stephan_, Jun 10 2005

%Y Cf. A034121.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Sep 15 1998