A078157 a(n) = A078152(2^n).

0, 0, 0, 2, 4, 8, 13, 22, 34, 52, 77, 114, 166, 240, 345, 494, 705, 1004, 1427, 2026, 2873, 4072, 5767, 8166, 11558, 16356, 23141, 32738, 46309, 65504, 92648, 131038, 185328, 262108, 370690, 524250, 741416, 1048536, 1482869, 2097110, 2965777

Offset: 1

Author

Labos Elemer, Nov 27 2002

Keywords

• nonn

Crossrefs

Cf. A078152, A078153, A078154, A078155, A078156, A078158.

Formula

For n>1, a(n) = floor(sqrt(2^(n+2))) - n - 2

Extensions

Extended by Robert G. Wilson v, Dec 02 2002

More terms from Max Alekseyev, Feb 12 2012