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# A Handbook of Integer Sequences

*A Handbook of Integer Sequences*,
N. J. A. Sloane,
Academic Press,, NY, 1973, xiii+206 pp.,
ISBN 0-12-648550-X.

The *Handbook* contains 2372 sequences in lexicographic order which are assigned numbers from 1 to 2372. It only includes sequences of nonnegative integers, sequences containing negative numbers being replaced by their absolute values. Only infinite (or conjectured to be, e.g. Mersenne primes) sequences are included. The lexicographic order is defined by omitting all initial 0's and 1's and replacing them by a single 1. The initial 1 is added even if it was not in the original sequence.^{[1]}

## History

**1965** Neil Sloane begins collecting integer sequences on file cards, which were later transferred to computer punched cards.

**1972** Working at AT&T Bell Labs, Neil Sloane completes the manuscript for *A Handbook of Integer Sequences*.

**1973** * A Handbook of Integer Sequences* is published by Academic Press.

**1974** Several supplements to the *Handbook* are issued and sent to people upon request.

**1995** 22 years after the *HIS*, a new book, *The Encyclopedia of Integer Sequences*, by N. J. A. Sloane and S. Plouffe, is published.

## See also

## Notes

- ↑ Donald D. Spencer:
*Key Dates in Number Theory History*. Camelot Publishing Company, Ormond Beach, Florida (1995) p. 81: "1973*A Handbook of Integer Sequences*was published by Academic Press. This book, compiled by N.J.A. Sloane of Bell Laboratories, lists more than 2300 integer sequences in numerical order."