A133431 Old-fashioned version of A002504 (the initial 1 should be omitted since 1 is no longer regarded as a prime, although it was in 1912).

1, 2, 3, 4, 5, 7, 10, 11, 12, 14, 15, 18, 24, 25, 26, 28, 29, 31, 33, 35, 38, 39, 42, 43, 46, 49, 50, 53, 56, 59, 63, 64, 67, 68, 75, 81, 82, 87, 89, 91, 92, 94, 96, 106, 109, 120, 124, 126, 129, 130, 137, 141, 143, 148, 154, 157, 158, 159, 165, 166, 171, 172, 173, 176, 180, 185, 186, 187, 192, 194, 196, 197

Offset

1,2

References

A. J. C. Cunningham, On quasi-Mersennian numbers, Mess. Math., 41 (1912), 119-146.

Links

Table of n, a(n) for n=1..72.

Crossrefs

Sequence in context: A117092 A285276 A002504 * A305705 A123091 A191918

Adjacent sequences: A133428 A133429 A133430 * A133432 A133433 A133434

Keyword

nonn

Author

N. J. A. Sloane, Nov 28 2007

Status

approved