A034131 Decimal part of cube root of a(n) starts with 5: first term of runs.

4, 16, 43, 92, 167, 275, 422, 615, 858, 1158, 1521, 1954, 2461, 3049, 3724, 4493, 5360, 6332, 7415, 8616, 9939, 11391, 12978, 14707, 16582, 18610, 20797, 23150, 25673, 28373, 31256, 34329, 37596, 41064, 44739, 48628, 52735, 57067, 61630

Offset: 1

Author

Patrick De Geest, Sep 15 1998

Keywords

• nonn
• base

Crossrefs

Cf. A034121.

Formula

a(n) = ceiling((n+1/2)^3). - Benoit Cloitre, Apr 16 2003

(1/8) {8n^3 + 36n^2 + 54n + 31 - (-1)^n - 2(-1)^[(n-1)/2] }. - Ralf Stephan, Jun 10 2005