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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
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 (list; graph; refs; listen; history; text; internal format)
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: A047502 A117092 A002504 * A123091 A191918 A191925

Adjacent sequences:  A133428 A133429 A133430 * A133432 A133433 A133434

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 28 2007

STATUS

approved

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Last modified September 21 06:04 EDT 2014. Contains 247022 sequences.