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A002116 Some special numbers.
(Formerly M2125 N0842)
1
2, 20, 402, 14440, 825502, 69055260, 7960285802, 1209873973712 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

A. Fletcher, J. C. P. Miller, L. Rosenhead and L. J. Comrie, An Index of Mathematical Tables. Vols. 1 and 2, 2nd ed., Blackwell, Oxford and Addison-Wesley, Reading, MA, 1962, Vol. 1, p. 77.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Sequence in context: A090728 A210896 A090309 * A058346 A165554 A009746

Adjacent sequences:  A002113 A002114 A002115 * A002117 A002118 A002119

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified December 11 07:18 EST 2019. Contains 329914 sequences. (Running on oeis4.)