A137831 (Prime(n)^2 minus its last digit)/20.

0, 0, 1, 2, 6, 8, 14, 18, 26, 42, 48, 68, 84, 92, 110, 140, 174, 186, 224, 252, 266, 312, 344, 396, 470, 510, 530, 572, 594, 638, 806, 858, 938, 966, 1110, 1140, 1232, 1328, 1394, 1496, 1602, 1638, 1824, 1862, 1940, 1980, 2226, 2486, 2576, 2622, 2714, 2856

Offset

1,4

Links

Table of n, a(n) for n=1..52.

Formula

a(n) = (A001248(n)-A137807(n))/20. - R. J. Mathar, May 23 2008

Crossrefs

Cf. A001248, A137807.

Sequence in context: A104636 A212014 A270050 * A117588 A174229 A187217

Adjacent sequences: A137828 A137829 A137830 * A137832 A137833 A137834

Keyword

nonn,base,easy

Author

Paul Curtz, Apr 29 2008

Extensions

More terms from R. J. Mathar, May 23 2008

Status

approved